Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/Documentation/kernel-parameters.txt
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Tag kernel26-2.6.12-alx-r9
1 | February 2003 Kernel Parameters v2.5.59 |
2 | ~~~~~~~~~~~~~~~~~ |
3 | |
4 | The following is a consolidated list of the kernel parameters as implemented |
5 | (mostly) by the __setup() macro and sorted into English Dictionary order |
6 | (defined as ignoring all punctuation and sorting digits before letters in a |
7 | case insensitive manner), and with descriptions where known. |
8 | |
9 | Module parameters for loadable modules are specified only as the |
10 | parameter name with optional '=' and value as appropriate, such as: |
11 | |
12 | modprobe usbcore blinkenlights=1 |
13 | |
14 | Module parameters for modules that are built into the kernel image |
15 | are specified on the kernel command line with the module name plus |
16 | '.' plus parameter name, with '=' and value if appropriate, such as: |
17 | |
18 | usbcore.blinkenlights=1 |
19 | |
20 | The text in square brackets at the beginning of the description state the |
21 | restrictions on the kernel for the said kernel parameter to be valid. The |
22 | restrictions referred to are that the relevant option is valid if: |
23 | |
24 | ACPI ACPI support is enabled. |
25 | ALSA ALSA sound support is enabled. |
26 | APIC APIC support is enabled. |
27 | APM Advanced Power Management support is enabled. |
28 | AX25 Appropriate AX.25 support is enabled. |
29 | CD Appropriate CD support is enabled. |
30 | DEVFS devfs support is enabled. |
31 | DRM Direct Rendering Management support is enabled. |
32 | EDD BIOS Enhanced Disk Drive Services (EDD) is enabled |
33 | EFI EFI Partitioning (GPT) is enabled |
34 | EIDE EIDE/ATAPI support is enabled. |
35 | FB The frame buffer device is enabled. |
36 | HW Appropriate hardware is enabled. |
37 | IA-32 IA-32 aka i386 architecture is enabled. |
38 | IA-64 IA-64 architecture is enabled. |
39 | IOSCHED More than one I/O scheduler is enabled. |
40 | IP_PNP IP DCHP, BOOTP, or RARP is enabled. |
41 | ISAPNP ISA PnP code is enabled. |
42 | ISDN Appropriate ISDN support is enabled. |
43 | JOY Appropriate joystick support is enabled. |
44 | LP Printer support is enabled. |
45 | LOOP Loopback device support is enabled. |
46 | M68k M68k architecture is enabled. |
47 | These options have more detailed description inside of |
48 | Documentation/m68k/kernel-options.txt. |
49 | MCA MCA bus support is enabled. |
50 | MDA MDA console support is enabled. |
51 | MOUSE Appropriate mouse support is enabled. |
52 | MTD MTD support is enabled. |
53 | NET Appropriate network support is enabled. |
54 | NUMA NUMA support is enabled. |
55 | NFS Appropriate NFS support is enabled. |
56 | OSS OSS sound support is enabled. |
57 | PARIDE The ParIDE subsystem is enabled. |
58 | PARISC The PA-RISC architecture is enabled. |
59 | PCI PCI bus support is enabled. |
60 | PCMCIA The PCMCIA subsystem is enabled. |
61 | PNP Plug & Play support is enabled. |
62 | PPC PowerPC architecture is enabled. |
63 | PPT Parallel port support is enabled. |
64 | PS2 Appropriate PS/2 support is enabled. |
65 | RAM RAM disk support is enabled. |
66 | S390 S390 architecture is enabled. |
67 | SCSI Appropriate SCSI support is enabled. |
68 | A lot of drivers has their options described inside of |
69 | Documentation/scsi/. |
70 | SELINUX SELinux support is enabled. |
71 | SERIAL Serial support is enabled. |
72 | SMP The kernel is an SMP kernel. |
73 | SPARC Sparc architecture is enabled. |
74 | SWSUSP Software suspension is enabled. |
75 | TS Appropriate touchscreen support is enabled. |
76 | USB USB support is enabled. |
77 | USBHID USB Human Interface Device support is enabled. |
78 | V4L Video For Linux support is enabled. |
79 | VGA The VGA console has been enabled. |
80 | VT Virtual terminal support is enabled. |
81 | WDT Watchdog support is enabled. |
82 | XT IBM PC/XT MFM hard disk support is enabled. |
83 | X86-64 X86-64 architecture is enabled. |
84 | More X86-64 boot options can be found in |
85 | Documentation/x86_64/boot-options.txt . |
86 | |
87 | In addition, the following text indicates that the option: |
88 | |
89 | BUGS= Relates to possible processor bugs on the said processor. |
90 | KNL Is a kernel start-up parameter. |
91 | BOOT Is a boot loader parameter. |
92 | |
93 | Parameters denoted with BOOT are actually interpreted by the boot |
94 | loader, and have no meaning to the kernel directly. |
95 | Do not modify the syntax of boot loader parameters without extreme |
96 | need or coordination with <Documentation/i386/boot.txt>. |
97 | |
98 | Note that ALL kernel parameters listed below are CASE SENSITIVE, and that |
99 | a trailing = on the name of any parameter states that that parameter will |
100 | be entered as an environment variable, whereas its absence indicates that |
101 | it will appear as a kernel argument readable via /proc/cmdline by programs |
102 | running once the system is up. |
103 | |
104 | 53c7xx= [HW,SCSI] Amiga SCSI controllers |
105 | See header of drivers/scsi/53c7xx.c. |
106 | See also Documentation/scsi/ncr53c7xx.txt. |
107 | |
108 | acpi= [HW,ACPI] Advanced Configuration and Power Interface |
109 | Format: { force | off | ht | strict } |
110 | force -- enable ACPI if default was off |
111 | off -- disable ACPI if default was on |
112 | noirq -- do not use ACPI for IRQ routing |
113 | ht -- run only enough ACPI to enable Hyper Threading |
114 | strict -- Be less tolerant of platforms that are not |
115 | strictly ACPI specification compliant. |
116 | |
117 | See also Documentation/pm.txt, pci=noacpi |
118 | |
119 | acpi_sleep= [HW,ACPI] Sleep options |
120 | Format: { s3_bios, s3_mode } |
121 | See Documentation/power/video.txt |
122 | |
123 | acpi_sci= [HW,ACPI] ACPI System Control Interrupt trigger mode |
124 | Format: { level | edge | high | low } |
125 | |
126 | acpi_irq_balance [HW,ACPI] ACPI will balance active IRQs |
127 | default in APIC mode |
128 | |
129 | acpi_irq_nobalance [HW,ACPI] ACPI will not move active IRQs (default) |
130 | default in PIC mode |
131 | |
132 | acpi_irq_pci= [HW,ACPI] If irq_balance, Clear listed IRQs for use by PCI |
133 | Format: <irq>,<irq>... |
134 | |
135 | acpi_irq_isa= [HW,ACPI] If irq_balance, Mark listed IRQs used by ISA |
136 | Format: <irq>,<irq>... |
137 | |
138 | acpi_osi= [HW,ACPI] empty param disables _OSI |
139 | |
140 | acpi_serialize [HW,ACPI] force serialization of AML methods |
141 | |
142 | acpi_skip_timer_override [HW,ACPI] |
143 | Recognize and ignore IRQ0/pin2 Interrupt Override. |
144 | For broken nForce2 BIOS resulting in XT-PIC timer. |
145 | |
146 | acpi_dbg_layer= [HW,ACPI] |
147 | Format: <int> |
148 | Each bit of the <int> indicates an acpi debug layer, |
149 | 1: enable, 0: disable. It is useful for boot time |
150 | debugging. After system has booted up, it can be set |
151 | via /proc/acpi/debug_layer. |
152 | |
153 | acpi_dbg_level= [HW,ACPI] |
154 | Format: <int> |
155 | Each bit of the <int> indicates an acpi debug level, |
156 | 1: enable, 0: disable. It is useful for boot time |
157 | debugging. After system has booted up, it can be set |
158 | via /proc/acpi/debug_level. |
159 | |
160 | acpi_fake_ecdt [HW,ACPI] Workaround failure due to BIOS lacking ECDT |
161 | |
162 | ad1816= [HW,OSS] |
163 | Format: <io>,<irq>,<dma>,<dma2> |
164 | See also Documentation/sound/oss/AD1816. |
165 | |
166 | ad1848= [HW,OSS] |
167 | Format: <io>,<irq>,<dma>,<dma2>,<type> |
168 | |
169 | adlib= [HW,OSS] |
170 | Format: <io> |
171 | |
172 | advansys= [HW,SCSI] |
173 | See header of drivers/scsi/advansys.c. |
174 | |
175 | advwdt= [HW,WDT] Advantech WDT |
176 | Format: <iostart>,<iostop> |
177 | |
178 | aedsp16= [HW,OSS] Audio Excel DSP 16 |
179 | Format: <io>,<irq>,<dma>,<mss_io>,<mpu_io>,<mpu_irq> |
180 | See also header of sound/oss/aedsp16.c. |
181 | |
182 | aha152x= [HW,SCSI] |
183 | See Documentation/scsi/aha152x.txt. |
184 | |
185 | aha1542= [HW,SCSI] |
186 | Format: <portbase>[,<buson>,<busoff>[,<dmaspeed>]] |
187 | |
188 | aic7xxx= [HW,SCSI] |
189 | See Documentation/scsi/aic7xxx.txt. |
190 | |
191 | aic79xx= [HW,SCSI] |
192 | See Documentation/scsi/aic79xx.txt. |
193 | |
194 | AM53C974= [HW,SCSI] |
195 | Format: <host-scsi-id>,<target-scsi-id>,<max-rate>,<max-offset> |
196 | See also header of drivers/scsi/AM53C974.c. |
197 | |
198 | amijoy.map= [HW,JOY] Amiga joystick support |
199 | Map of devices attached to JOY0DAT and JOY1DAT |
200 | Format: <a>,<b> |
201 | See also Documentation/kernel/input/joystick.txt |
202 | |
203 | analog.map= [HW,JOY] Analog joystick and gamepad support |
204 | Specifies type or capabilities of an analog joystick |
205 | connected to one of 16 gameports |
206 | Format: <type1>,<type2>,..<type16> |
207 | |
208 | apc= [HW,SPARC] Power management functions (SPARCstation-4/5 + deriv.) |
209 | Format: noidle |
210 | Disable APC CPU standby support. SPARCstation-Fox does |
211 | not play well with APC CPU idle - disable it if you have |
212 | APC and your system crashes randomly. |
213 | |
214 | apic= [APIC,i386] Change the output verbosity whilst booting |
215 | Format: { quiet (default) | verbose | debug } |
216 | Change the amount of debugging information output |
217 | when initialising the APIC and IO-APIC components. |
218 | |
219 | apm= [APM] Advanced Power Management |
220 | See header of arch/i386/kernel/apm.c. |
221 | |
222 | applicom= [HW] |
223 | Format: <mem>,<irq> |
224 | |
225 | arcrimi= [HW,NET] ARCnet - "RIM I" (entirely mem-mapped) cards |
226 | Format: <io>,<irq>,<nodeID> |
227 | |
228 | ataflop= [HW,M68k] |
229 | |
230 | atarimouse= [HW,MOUSE] Atari Mouse |
231 | |
232 | atascsi= [HW,SCSI] Atari SCSI |
233 | |
234 | atkbd.extra= [HW] Enable extra LEDs and keys on IBM RapidAccess, |
235 | EzKey and similar keyboards |
236 | |
237 | atkbd.reset= [HW] Reset keyboard during initialization |
238 | |
239 | atkbd.set= [HW] Select keyboard code set |
240 | Format: <int> (2 = AT (default) 3 = PS/2) |
241 | |
242 | atkbd.scroll= [HW] Enable scroll wheel on MS Office and similar |
243 | keyboards |
244 | |
245 | atkbd.softraw= [HW] Choose between synthetic and real raw mode |
246 | Format: <bool> (0 = real, 1 = synthetic (default)) |
247 | |
248 | atkbd.softrepeat= |
249 | [HW] Use software keyboard repeat |
250 | |
251 | autotest [IA64] |
252 | |
253 | awe= [HW,OSS] AWE32/SB32/AWE64 wave table synth |
254 | Format: <io>,<memsize>,<isapnp> |
255 | |
256 | aztcd= [HW,CD] Aztech CD268 CDROM driver |
257 | Format: <io>,0x79 (?) |
258 | |
259 | baycom_epp= [HW,AX25] |
260 | Format: <io>,<mode> |
261 | |
262 | baycom_par= [HW,AX25] BayCom Parallel Port AX.25 Modem |
263 | Format: <io>,<mode> |
264 | See header of drivers/net/hamradio/baycom_par.c. |
265 | |
266 | baycom_ser_fdx= [HW,AX25] BayCom Serial Port AX.25 Modem (Full Duplex Mode) |
267 | Format: <io>,<irq>,<mode>[,<baud>] |
268 | See header of drivers/net/hamradio/baycom_ser_fdx.c. |
269 | |
270 | baycom_ser_hdx= [HW,AX25] BayCom Serial Port AX.25 Modem (Half Duplex Mode) |
271 | Format: <io>,<irq>,<mode> |
272 | See header of drivers/net/hamradio/baycom_ser_hdx.c. |
273 | |
274 | blkmtd_device= [HW,MTD] |
275 | blkmtd_erasesz= |
276 | blkmtd_ro= |
277 | blkmtd_bs= |
278 | blkmtd_count= |
279 | |
280 | bttv.card= [HW,V4L] bttv (bt848 + bt878 based grabber cards) |
281 | bttv.radio= Most important insmod options are available as kernel args too. |
282 | bttv.pll= See Documentation/video4linux/bttv/Insmod-options |
283 | bttv.tuner= and Documentation/video4linux/bttv/CARDLIST |
284 | |
285 | BusLogic= [HW,SCSI] |
286 | See drivers/scsi/BusLogic.c, comment before function |
287 | BusLogic_ParseDriverOptions(). |
288 | |
289 | c101= [NET] Moxa C101 synchronous serial card |
290 | |
291 | cachesize= [BUGS=IA-32] Override level 2 CPU cache size detection. |
292 | Sometimes CPU hardware bugs make them report the cache |
293 | size incorrectly. The kernel will attempt work arounds |
294 | to fix known problems, but for some CPUs it is not |
295 | possible to determine what the correct size should be. |
296 | This option provides an override for these situations. |
297 | |
298 | cdu31a= [HW,CD] |
299 | Format: <io>,<irq>[,PAS] |
300 | See header of drivers/cdrom/cdu31a.c. |
301 | |
302 | chandev= [HW,NET] Generic channel device initialisation |
303 | |
304 | checkreqprot [SELINUX] Set initial checkreqprot flag value. |
305 | Format: { "0" | "1" } |
306 | See security/selinux/Kconfig help text. |
307 | 0 -- check protection applied by kernel (includes any implied execute protection). |
308 | 1 -- check protection requested by application. |
309 | Default value is set via a kernel config option. |
310 | Value can be changed at runtime via /selinux/checkreqprot. |
311 | |
312 | clock= [BUGS=IA-32, HW] gettimeofday timesource override. |
313 | Forces specified timesource (if avaliable) to be used |
314 | when calculating gettimeofday(). If specicified timesource |
315 | is not avalible, it defaults to PIT. |
316 | Format: { pit | tsc | cyclone | pmtmr } |
317 | |
318 | hpet= [IA-32,HPET] option to disable HPET and use PIT. |
319 | Format: disable |
320 | |
321 | cm206= [HW,CD] |
322 | Format: { auto | [<io>,][<irq>] } |
323 | |
324 | com20020= [HW,NET] ARCnet - COM20020 chipset |
325 | Format: <io>[,<irq>[,<nodeID>[,<backplane>[,<ckp>[,<timeout>]]]]] |
326 | |
327 | com90io= [HW,NET] ARCnet - COM90xx chipset (IO-mapped buffers) |
328 | Format: <io>[,<irq>] |
329 | |
330 | com90xx= [HW,NET] ARCnet - COM90xx chipset (memory-mapped buffers) |
331 | Format: <io>[,<irq>[,<memstart>]] |
332 | |
333 | condev= [HW,S390] console device |
334 | conmode= |
335 | |
336 | console= [KNL] Output console device and options. |
337 | |
338 | tty<n> Use the virtual console device <n>. |
339 | |
340 | ttyS<n>[,options] |
341 | Use the specified serial port. The options are of |
342 | the form "bbbbpn", where "bbbb" is the baud rate, |
343 | "p" is parity ("n", "o", or "e"), and "n" is bits. |
344 | Default is "9600n8". |
345 | |
346 | See also Documentation/serial-console.txt. |
347 | |
348 | uart,io,<addr>[,options] |
349 | uart,mmio,<addr>[,options] |
350 | Start an early, polled-mode console on the 8250/16550 |
351 | UART at the specified I/O port or MMIO address, |
352 | switching to the matching ttyS device later. The |
353 | options are the same as for ttyS, above. |
354 | |
355 | cpcihp_generic= [HW,PCI] Generic port I/O CompactPCI driver |
356 | Format: <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>] |
357 | |
358 | cpia_pp= [HW,PPT] |
359 | Format: { parport<nr> | auto | none } |
360 | |
361 | cs4232= [HW,OSS] |
362 | Format: <io>,<irq>,<dma>,<dma2>,<mpuio>,<mpuirq> |
363 | |
364 | cs89x0_dma= [HW,NET] |
365 | Format: <dma> |
366 | |
367 | cs89x0_media= [HW,NET] |
368 | Format: { rj45 | aui | bnc } |
369 | |
370 | cyclades= [HW,SERIAL] Cyclades multi-serial port adapter. |
371 | |
372 | dasd= [HW,NET] |
373 | See header of drivers/s390/block/dasd_devmap.c. |
374 | |
375 | db9.dev[2|3]= [HW,JOY] Multisystem joystick support via parallel port |
376 | (one device per port) |
377 | Format: <port#>,<type> |
378 | See also Documentation/input/joystick-parport.txt |
379 | |
380 | debug [KNL] Enable kernel debugging (events log level). |
381 | |
382 | decnet= [HW,NET] |
383 | Format: <area>[,<node>] |
384 | See also Documentation/networking/decnet.txt. |
385 | |
386 | devfs= [DEVFS] |
387 | See Documentation/filesystems/devfs/boot-options. |
388 | |
389 | dhash_entries= [KNL] |
390 | Set number of hash buckets for dentry cache. |
391 | |
392 | digi= [HW,SERIAL] |
393 | IO parameters + enable/disable command. |
394 | |
395 | digiepca= [HW,SERIAL] |
396 | See drivers/char/README.epca and |
397 | Documentation/digiepca.txt. |
398 | |
399 | dmascc= [HW,AX25,SERIAL] AX.25 Z80SCC driver with DMA |
400 | support available. |
401 | Format: <io_dev0>[,<io_dev1>[,..<io_dev32>]] |
402 | |
403 | dmasound= [HW,OSS] Sound subsystem buffers |
404 | |
405 | dscc4.setup= [NET] |
406 | |
407 | dtc3181e= [HW,SCSI] |
408 | |
409 | earlyprintk= [IA-32, X86-64] |
410 | earlyprintk=vga |
411 | earlyprintk=serial[,ttySn[,baudrate]] |
412 | |
413 | Append ,keep to not disable it when the real console |
414 | takes over. |
415 | |
416 | Only vga or serial at a time, not both. |
417 | |
418 | Currently only ttyS0 and ttyS1 are supported. |
419 | |
420 | Interaction with the standard serial driver is not |
421 | very good. |
422 | |
423 | The VGA output is eventually overwritten by the real |
424 | console. |
425 | |
426 | eata= [HW,SCSI] |
427 | |
428 | eda= [HW,PS2] |
429 | |
430 | edb= [HW,PS2] |
431 | |
432 | edd= [EDD] |
433 | Format: {"of[f]" | "sk[ipmbr]"} |
434 | See comment in arch/i386/boot/edd.S |
435 | |
436 | eicon= [HW,ISDN] |
437 | Format: <id>,<membase>,<irq> |
438 | |
439 | eisa_irq_edge= [PARISC,HW] |
440 | See header of drivers/parisc/eisa.c. |
441 | |
442 | elanfreq= [IA-32] |
443 | See comment before function elanfreq_setup() in |
444 | arch/i386/kernel/cpu/cpufreq/elanfreq.c. |
445 | |
446 | elevator= [IOSCHED] |
447 | Format: {"as"|"cfq"|"deadline"|"noop"} |
448 | See Documentation/block/as-iosched.txt |
449 | and Documentation/block/deadline-iosched.txt for details. |
450 | |
451 | enforcing [SELINUX] Set initial enforcing status. |
452 | Format: {"0" | "1"} |
453 | See security/selinux/Kconfig help text. |
454 | 0 -- permissive (log only, no denials). |
455 | 1 -- enforcing (deny and log). |
456 | Default value is 0. |
457 | Value can be changed at runtime via /selinux/enforce. |
458 | |
459 | es1370= [HW,OSS] |
460 | Format: <lineout>[,<micbias>] |
461 | See also header of sound/oss/es1370.c. |
462 | |
463 | es1371= [HW,OSS] |
464 | Format: <spdif>,[<nomix>,[<amplifier>]] |
465 | See also header of sound/oss/es1371.c. |
466 | |
467 | ether= [HW,NET] Ethernet cards parameters |
468 | This option is obsoleted by the "netdev=" option, which |
469 | has equivalent usage. See its documentation for details. |
470 | |
471 | eurwdt= [HW,WDT] Eurotech CPU-1220/1410 onboard watchdog. |
472 | Format: <io>[,<irq>] |
473 | |
474 | fd_mcs= [HW,SCSI] |
475 | See header of drivers/scsi/fd_mcs.c. |
476 | |
477 | fdomain= [HW,SCSI] |
478 | See header of drivers/scsi/fdomain.c. |
479 | |
480 | floppy= [HW] |
481 | See Documentation/floppy.txt. |
482 | |
483 | ftape= [HW] Floppy Tape subsystem debugging options. |
484 | See Documentation/ftape.txt. |
485 | |
486 | gamecon.map[2|3]= |
487 | [HW,JOY] Multisystem joystick and NES/SNES/PSX pad |
488 | support via parallel port (up to 5 devices per port) |
489 | Format: <port#>,<pad1>,<pad2>,<pad3>,<pad4>,<pad5> |
490 | See also Documentation/input/joystick-parport.txt |
491 | |
492 | gamma= [HW,DRM] |
493 | |
494 | gdth= [HW,SCSI] |
495 | See header of drivers/scsi/gdth.c. |
496 | |
497 | gpt [EFI] Forces disk with valid GPT signature but |
498 | invalid Protective MBR to be treated as GPT. |
499 | |
500 | gscd= [HW,CD] |
501 | Format: <io> |
502 | |
503 | gt96100eth= [NET] MIPS GT96100 Advanced Communication Controller |
504 | |
505 | gus= [HW,OSS] |
506 | Format: <io>,<irq>,<dma>,<dma16> |
507 | |
508 | gvp11= [HW,SCSI] |
509 | |
510 | hashdist= [KNL,NUMA] Large hashes allocated during boot |
511 | are distributed across NUMA nodes. Defaults on |
512 | for IA-64, off otherwise. |
513 | |
514 | hcl= [IA-64] SGI's Hardware Graph compatibility layer |
515 | |
516 | hd= [EIDE] (E)IDE hard drive subsystem geometry |
517 | Format: <cyl>,<head>,<sect> |
518 | |
519 | hd?= [HW] (E)IDE subsystem |
520 | hd?lun= See Documentation/ide.txt. |
521 | |
522 | highmem=nn[KMG] [KNL,BOOT] forces the highmem zone to have an exact |
523 | size of <nn>. This works even on boxes that have no |
524 | highmem otherwise. This also works to reduce highmem |
525 | size on bigger boxes. |
526 | |
527 | hisax= [HW,ISDN] |
528 | See Documentation/isdn/README.HiSax. |
529 | |
530 | hugepages= [HW,IA-32,IA-64] Maximal number of HugeTLB pages. |
531 | |
532 | noirqbalance [IA-32,SMP,KNL] Disable kernel irq balancing |
533 | |
534 | i8042.direct [HW] Put keyboard port into non-translated mode |
535 | i8042.dumbkbd [HW] Pretend that controlled can only read data from |
536 | keyboard and can not control its state |
537 | (Don't attempt to blink the leds) |
538 | i8042.noaux [HW] Don't check for auxiliary (== mouse) port |
539 | i8042.nomux [HW] Don't check presence of an active multiplexing |
540 | controller |
541 | i8042.nopnp [HW] Don't use ACPIPnP / PnPBIOS to discover KBD/AUX |
542 | controllers |
543 | i8042.panicblink= |
544 | [HW] Frequency with which keyboard LEDs should blink |
545 | when kernel panics (default is 0.5 sec) |
546 | i8042.reset [HW] Reset the controller during init and cleanup |
547 | i8042.unlock [HW] Unlock (ignore) the keylock |
548 | |
549 | i810= [HW,DRM] |
550 | |
551 | i8k.force [HW] Activate i8k driver even if SMM BIOS signature |
552 | does not match list of supported models. |
553 | i8k.power_status |
554 | [HW] Report power status in /proc/i8k |
555 | (disabled by default) |
556 | i8k.restricted [HW] Allow controlling fans only if SYS_ADMIN |
557 | capability is set. |
558 | |
559 | ibmmcascsi= [HW,MCA,SCSI] IBM MicroChannel SCSI adapter |
560 | See Documentation/mca.txt. |
561 | |
562 | icn= [HW,ISDN] |
563 | Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]] |
564 | |
565 | ide= [HW] (E)IDE subsystem |
566 | Format: ide=nodma or ide=doubler or ide=reverse |
567 | See Documentation/ide.txt. |
568 | |
569 | ide?= [HW] (E)IDE subsystem |
570 | Format: ide?=noprobe or chipset specific parameters. |
571 | See Documentation/ide.txt. |
572 | |
573 | idebus= [HW] (E)IDE subsystem - VLB/PCI bus speed |
574 | See Documentation/ide.txt. |
575 | |
576 | idle= [HW] |
577 | Format: idle=poll or idle=halt |
578 | |
579 | ihash_entries= [KNL] |
580 | Set number of hash buckets for inode cache. |
581 | |
582 | in2000= [HW,SCSI] |
583 | See header of drivers/scsi/in2000.c. |
584 | |
585 | init= [KNL] |
586 | Format: <full_path> |
587 | Run specified binary instead of /sbin/init as init |
588 | process. |
589 | |
590 | initcall_debug [KNL] Trace initcalls as they are executed. Useful |
591 | for working out where the kernel is dying during |
592 | startup. |
593 | |
594 | initrd= [BOOT] Specify the location of the initial ramdisk |
595 | |
596 | inport.irq= [HW] Inport (ATI XL and Microsoft) busmouse driver |
597 | Format: <irq> |
598 | |
599 | inttest= [IA64] |
600 | |
601 | io7= [HW] IO7 for Marvel based alpha systems |
602 | See comment before marvel_specify_io7 in |
603 | arch/alpha/kernel/core_marvel.c. |
604 | |
605 | ip= [IP_PNP] |
606 | See Documentation/nfsroot.txt. |
607 | |
608 | ip2= [HW] Set IO/IRQ pairs for up to 4 IntelliPort boards |
609 | See comment before ip2_setup() in drivers/char/ip2.c. |
610 | |
611 | ips= [HW,SCSI] Adaptec / IBM ServeRAID controller |
612 | See header of drivers/scsi/ips.c. |
613 | |
614 | isapnp= [ISAPNP] |
615 | Format: <RDP>, <reset>, <pci_scan>, <verbosity> |
616 | |
617 | isolcpus= [KNL,SMP] Isolate CPUs from the general scheduler. |
618 | Format: <cpu number>,...,<cpu number> |
619 | This option can be used to specify one or more CPUs |
620 | to isolate from the general SMP balancing and scheduling |
621 | algorithms. The only way to move a process onto or off |
622 | an "isolated" CPU is via the CPU affinity syscalls. |
623 | <cpu number> begins at 0 and the maximum value is |
624 | "number of CPUs in system - 1". |
625 | |
626 | This option is the preferred way to isolate CPUs. The |
627 | alternative - manually setting the CPU mask of all tasks |
628 | in the system can cause problems and suboptimal load |
629 | balancer performance. |
630 | |
631 | isp16= [HW,CD] |
632 | Format: <io>,<irq>,<dma>,<setup> |
633 | |
634 | iucv= [HW,NET] |
635 | |
636 | js= [HW,JOY] Analog joystick |
637 | See Documentation/input/joystick.txt. |
638 | |
639 | keepinitrd [HW,ARM] |
640 | |
641 | kstack=N [IA-32, X86-64] Print N words from the kernel stack |
642 | in oops dumps. |
643 | |
644 | l2cr= [PPC] |
645 | |
646 | lapic [IA-32,APIC] Enable the local APIC even if BIOS disabled it. |
647 | |
648 | lasi= [HW,SCSI] PARISC LASI driver for the 53c700 chip |
649 | Format: addr:<io>,irq:<irq> |
650 | |
651 | llsc*= [IA64] |
652 | See function print_params() in arch/ia64/sn/kernel/llsc4.c. |
653 | |
654 | load_ramdisk= [RAM] List of ramdisks to load from floppy |
655 | See Documentation/ramdisk.txt. |
656 | |
657 | lockd.udpport= [NFS] |
658 | |
659 | lockd.tcpport= [NFS] |
660 | |
661 | logibm.irq= [HW,MOUSE] Logitech Bus Mouse Driver |
662 | Format: <irq> |
663 | |
664 | loglevel= All Kernel Messages with a loglevel smaller than the |
665 | console loglevel will be printed to the console. It can |
666 | also be changed with klogd or other programs. The |
667 | loglevels are defined as follows: |
668 | |
669 | 0 (KERN_EMERG) system is unusable |
670 | 1 (KERN_ALERT) action must be taken immediately |
671 | 2 (KERN_CRIT) critical conditions |
672 | 3 (KERN_ERR) error conditions |
673 | 4 (KERN_WARNING) warning conditions |
674 | 5 (KERN_NOTICE) normal but significant condition |
675 | 6 (KERN_INFO) informational |
676 | 7 (KERN_DEBUG) debug-level messages |
677 | |
678 | log_buf_len=n Sets the size of the printk ring buffer, in bytes. |
679 | Format is n, nk, nM. n must be a power of two. The |
680 | default is set in kernel config. |
681 | |
682 | lp=0 [LP] Specify parallel ports to use, e.g, |
683 | lp=port[,port...] lp=none,parport0 (lp0 not configured, lp1 uses |
684 | lp=reset first parallel port). 'lp=0' disables the |
685 | lp=auto printer driver. 'lp=reset' (which can be |
686 | specified in addition to the ports) causes |
687 | attached printers to be reset. Using |
688 | lp=port1,port2,... specifies the parallel ports |
689 | to associate lp devices with, starting with |
690 | lp0. A port specification may be 'none' to skip |
691 | that lp device, or a parport name such as |
692 | 'parport0'. Specifying 'lp=auto' instead of a |
693 | port specification list means that device IDs |
694 | from each port should be examined, to see if |
695 | an IEEE 1284-compliant printer is attached; if |
696 | so, the driver will manage that printer. |
697 | See also header of drivers/char/lp.c. |
698 | |
699 | lpj=n [KNL] |
700 | Sets loops_per_jiffy to given constant, thus avoiding |
701 | time-consuming boot-time autodetection (up to 250 ms per |
702 | CPU). 0 enables autodetection (default). To determine |
703 | the correct value for your kernel, boot with normal |
704 | autodetection and see what value is printed. Note that |
705 | on SMP systems the preset will be applied to all CPUs, |
706 | which is likely to cause problems if your CPUs need |
707 | significantly divergent settings. An incorrect value |
708 | will cause delays in the kernel to be wrong, leading to |
709 | unpredictable I/O errors and other breakage. Although |
710 | unlikely, in the extreme case this might damage your |
711 | hardware. |
712 | |
713 | ltpc= [NET] |
714 | Format: <io>,<irq>,<dma> |
715 | |
716 | mac5380= [HW,SCSI] |
717 | Format: <can_queue>,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags> |
718 | |
719 | mac53c9x= [HW,SCSI] |
720 | Format: <num_esps>,<disconnect>,<nosync>,<can_queue>,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags> |
721 | |
722 | machvec= [IA64] |
723 | Force the use of a particular machine-vector (machvec) in a generic |
724 | kernel. Example: machvec=hpzx1_swiotlb |
725 | |
726 | mad16= [HW,OSS] |
727 | Format: <io>,<irq>,<dma>,<dma16>,<mpu_io>,<mpu_irq>,<joystick> |
728 | |
729 | maui= [HW,OSS] |
730 | Format: <io>,<irq> |
731 | |
732 | max_loop= [LOOP] Maximum number of loopback devices that can |
733 | be mounted |
734 | Format: <1-256> |
735 | |
736 | maxcpus= [SMP] Maximum number of processors that an SMP kernel |
737 | should make use of |
738 | |
739 | max_luns= [SCSI] Maximum number of LUNs to probe |
740 | Should be between 1 and 2^32-1. |
741 | |
742 | max_report_luns= |
743 | [SCSI] Maximum number of LUNs received |
744 | Should be between 1 and 16384. |
745 | |
746 | mca-pentium [BUGS=IA-32] |
747 | |
748 | mcatest= [IA-64] |
749 | |
750 | mcd= [HW,CD] |
751 | Format: <port>,<irq>,<mitsumi_bug_93_wait> |
752 | |
753 | mcdx= [HW,CD] |
754 | |
755 | mce [IA-32] Machine Check Exception |
756 | |
757 | md= [HW] RAID subsystems devices and level |
758 | See Documentation/md.txt. |
759 | |
760 | mdacon= [MDA] |
761 | Format: <first>,<last> |
762 | Specifies range of consoles to be captured by the MDA. |
763 | |
764 | mem=nn[KMG] [KNL,BOOT] Force usage of a specific amount of memory |
765 | Amount of memory to be used when the kernel is not able |
766 | to see the whole system memory or for test. |
767 | [IA-32] Use together with memmap= to avoid physical |
768 | address space collisions. Without memmap= PCI devices |
769 | could be placed at addresses belonging to unused RAM. |
770 | |
771 | mem=nopentium [BUGS=IA-32] Disable usage of 4MB pages for kernel |
772 | memory. |
773 | |
774 | memmap=exactmap [KNL,IA-32] Enable setting of an exact |
775 | E820 memory map, as specified by the user. |
776 | Such memmap=exactmap lines can be constructed based on |
777 | BIOS output or other requirements. See the memmap=nn@ss |
778 | option description. |
779 | |
780 | memmap=nn[KMG]@ss[KMG] |
781 | [KNL] Force usage of a specific region of memory |
782 | Region of memory to be used, from ss to ss+nn. |
783 | |
784 | memmap=nn[KMG]#ss[KMG] |
785 | [KNL,ACPI] Mark specific memory as ACPI data. |
786 | Region of memory to be used, from ss to ss+nn. |
787 | |
788 | memmap=nn[KMG]$ss[KMG] |
789 | [KNL,ACPI] Mark specific memory as reserved. |
790 | Region of memory to be used, from ss to ss+nn. |
791 | |
792 | meye.*= [HW] Set MotionEye Camera parameters |
793 | See Documentation/video4linux/meye.txt. |
794 | |
795 | mga= [HW,DRM] |
796 | |
797 | mousedev.tap_time= |
798 | [MOUSE] Maximum time between finger touching and |
799 | leaving touchpad surface for touch to be considered |
800 | a tap and be reported as a left button click (for |
801 | touchpads working in absolute mode only). |
802 | Format: <msecs> |
803 | mousedev.xres= [MOUSE] Horizontal screen resolution, used for devices |
804 | reporting absolute coordinates, such as tablets |
805 | mousedev.yres= [MOUSE] Vertical screen resolution, used for devices |
806 | reporting absolute coordinates, such as tablets |
807 | |
808 | mpu401= [HW,OSS] |
809 | Format: <io>,<irq> |
810 | |
811 | MTD_Partition= [MTD] |
812 | Format: <name>,<region-number>,<size>,<offset> |
813 | |
814 | MTD_Region= [MTD] |
815 | Format: <name>,<region-number>[,<base>,<size>,<buswidth>,<altbuswidth>] |
816 | |
817 | mtdparts= [MTD] |
818 | See drivers/mtd/cmdline.c. |
819 | |
820 | mtouchusb.raw_coordinates= |
821 | [HW] Make the MicroTouch USB driver use raw coordinates ('y', default) |
822 | or cooked coordinates ('n') |
823 | |
824 | n2= [NET] SDL Inc. RISCom/N2 synchronous serial card |
825 | |
826 | NCR_D700= [HW,SCSI] |
827 | See header of drivers/scsi/NCR_D700.c. |
828 | |
829 | ncr5380= [HW,SCSI] |
830 | |
831 | ncr53c400= [HW,SCSI] |
832 | |
833 | ncr53c400a= [HW,SCSI] |
834 | |
835 | ncr53c406a= [HW,SCSI] |
836 | |
837 | ncr53c8xx= [HW,SCSI] |
838 | |
839 | netdev= [NET] Network devices parameters |
840 | Format: <irq>,<io>,<mem_start>,<mem_end>,<name> |
841 | Note that mem_start is often overloaded to mean |
842 | something different and driver-specific. |
843 | |
844 | nfsaddrs= [NFS] |
845 | See Documentation/nfsroot.txt. |
846 | |
847 | nfsroot= [NFS] nfs root filesystem for disk-less boxes. |
848 | See Documentation/nfsroot.txt. |
849 | |
850 | nmi_watchdog= [KNL,BUGS=IA-32] Debugging features for SMP kernels |
851 | |
852 | no387 [BUGS=IA-32] Tells the kernel to use the 387 maths |
853 | emulation library even if a 387 maths coprocessor |
854 | is present. |
855 | |
856 | noalign [KNL,ARM] |
857 | |
858 | noapic [SMP,APIC] Tells the kernel to not make use of any |
859 | IOAPICs that may be present in the system. |
860 | |
861 | noasync [HW,M68K] Disables async and sync negotiation for |
862 | all devices. |
863 | |
864 | nobats [PPC] Do not use BATs for mapping kernel lowmem |
865 | on "Classic" PPC cores. |
866 | |
867 | nocache [ARM] |
868 | |
869 | nodisconnect [HW,SCSI,M68K] Disables SCSI disconnects. |
870 | |
871 | noexec [IA-64] |
872 | |
873 | noexec [IA-32, X86-64] |
874 | noexec=on: enable non-executable mappings (default) |
875 | noexec=off: disable nn-executable mappings |
876 | |
877 | nofxsr [BUGS=IA-32] |
878 | |
879 | nohlt [BUGS=ARM] |
880 | |
881 | no-hlt [BUGS=IA-32] Tells the kernel that the hlt |
882 | instruction doesn't work correctly and not to |
883 | use it. |
884 | |
885 | nohalt [IA-64] Tells the kernel not to use the power saving |
886 | function PAL_HALT_LIGHT when idle. This increases |
887 | power-consumption. On the positive side, it reduces |
888 | interrupt wake-up latency, which may improve performance |
889 | in certain environments such as networked servers or |
890 | real-time systems. |
891 | |
892 | noirqdebug [IA-32] Disables the code which attempts to detect and |
893 | disable unhandled interrupt sources. |
894 | |
895 | noisapnp [ISAPNP] Disables ISA PnP code. |
896 | |
897 | noinitrd [RAM] Tells the kernel not to load any configured |
898 | initial RAM disk. |
899 | |
900 | nointroute [IA-64] |
901 | |
902 | nolapic [IA-32,APIC] Do not enable or use the local APIC. |
903 | |
904 | noltlbs [PPC] Do not use large page/tlb entries for kernel |
905 | lowmem mapping on PPC40x. |
906 | |
907 | nomce [IA-32] Machine Check Exception |
908 | |
909 | noresidual [PPC] Don't use residual data on PReP machines. |
910 | |
911 | noresume [SWSUSP] Disables resume and restore original swap space. |
912 | |
913 | no-scroll [VGA] Disables scrollback. |
914 | This is required for the Braillex ib80-piezo Braille |
915 | reader made by F.H. Papenmeier (Germany). |
916 | |
917 | nosbagart [IA-64] |
918 | |
919 | nosmp [SMP] Tells an SMP kernel to act as a UP kernel. |
920 | |
921 | nosync [HW,M68K] Disables sync negotiation for all devices. |
922 | |
923 | notsc [BUGS=IA-32] Disable Time Stamp Counter |
924 | |
925 | nousb [USB] Disable the USB subsystem |
926 | |
927 | nowb [ARM] |
928 | |
929 | opl3= [HW,OSS] |
930 | Format: <io> |
931 | |
932 | opl3sa= [HW,OSS] |
933 | Format: <io>,<irq>,<dma>,<dma2>,<mpu_io>,<mpu_irq> |
934 | |
935 | opl3sa2= [HW,OSS] |
936 | Format: <io>,<irq>,<dma>,<dma2>,<mss_io>,<mpu_io>,<ymode>,<loopback>[,<isapnp>,<multiple] |
937 | |
938 | oprofile.timer= [HW] |
939 | Use timer interrupt instead of performance counters |
940 | |
941 | optcd= [HW,CD] |
942 | Format: <io> |
943 | |
944 | osst= [HW,SCSI] SCSI Tape Driver |
945 | Format: <buffer_size>,<write_threshold> |
946 | See also Documentation/scsi/st.txt. |
947 | |
948 | panic= [KNL] Kernel behaviour on panic |
949 | Format: <timeout> |
950 | |
951 | parkbd.port= [HW] Parallel port number the keyboard adapter is |
952 | connected to, default is 0. |
953 | Format: <parport#> |
954 | parkbd.mode= [HW] Parallel port keyboard adapter mode of operation, |
955 | 0 for XT, 1 for AT (default is AT). |
956 | Format: <mode> |
957 | |
958 | parport=0 [HW,PPT] Specify parallel ports. 0 disables. |
959 | parport=auto Use 'auto' to force the driver to use |
960 | parport=0xBBB[,IRQ[,DMA]] any IRQ/DMA settings detected (the |
961 | default is to ignore detected IRQ/DMA |
962 | settings because of possible |
963 | conflicts). You can specify the base |
964 | address, IRQ, and DMA settings; IRQ and |
965 | DMA should be numbers, or 'auto' (for |
966 | using detected settings on that |
967 | particular port), or 'nofifo' (to avoid |
968 | using a FIFO even if it is detected). |
969 | Parallel ports are assigned in the |
970 | order they are specified on the command |
971 | line, starting with parport0. |
972 | |
973 | parport_init_mode= |
974 | [HW,PPT] Configure VIA parallel port to |
975 | operate in specific mode. This is |
976 | necessary on Pegasos computer where |
977 | firmware has no options for setting up |
978 | parallel port mode and sets it to |
979 | spp. Currently this function knows |
980 | 686a and 8231 chips. |
981 | Format: [spp|ps2|epp|ecp|ecpepp] |
982 | |
983 | pas2= [HW,OSS] |
984 | Format: <io>,<irq>,<dma>,<dma16>,<sb_io>,<sb_irq>,<sb_dma>,<sb_dma16> |
985 | |
986 | pas16= [HW,SCSI] |
987 | See header of drivers/scsi/pas16.c. |
988 | |
989 | pcbit= [HW,ISDN] |
990 | |
991 | pcd. [PARIDE] |
992 | See header of drivers/block/paride/pcd.c. |
993 | See also Documentation/paride.txt. |
994 | |
995 | pci=option[,option...] [PCI] various PCI subsystem options: |
996 | off [IA-32] don't probe for the PCI bus |
997 | bios [IA-32] force use of PCI BIOS, don't access |
998 | the hardware directly. Use this if your machine |
999 | has a non-standard PCI host bridge. |
1000 | nobios [IA-32] disallow use of PCI BIOS, only direct |
1001 | hardware access methods are allowed. Use this |
1002 | if you experience crashes upon bootup and you |
1003 | suspect they are caused by the BIOS. |
1004 | conf1 [IA-32] Force use of PCI Configuration Mechanism 1. |
1005 | conf2 [IA-32] Force use of PCI Configuration Mechanism 2. |
1006 | nosort [IA-32] Don't sort PCI devices according to |
1007 | order given by the PCI BIOS. This sorting is done |
1008 | to get a device order compatible with older kernels. |
1009 | biosirq [IA-32] Use PCI BIOS calls to get the interrupt |
1010 | routing table. These calls are known to be buggy |
1011 | on several machines and they hang the machine when used, |
1012 | but on other computers it's the only way to get the |
1013 | interrupt routing table. Try this option if the kernel |
1014 | is unable to allocate IRQs or discover secondary PCI |
1015 | buses on your motherboard. |
1016 | rom [IA-32] Assign address space to expansion ROMs. |
1017 | Use with caution as certain devices share address |
1018 | decoders between ROMs and other resources. |
1019 | irqmask=0xMMMM [IA-32] Set a bit mask of IRQs allowed to be assigned |
1020 | automatically to PCI devices. You can make the kernel |
1021 | exclude IRQs of your ISA cards this way. |
1022 | lastbus=N [IA-32] Scan all buses till bus #N. Can be useful |
1023 | if the kernel is unable to find your secondary buses |
1024 | and you want to tell it explicitly which ones they are. |
1025 | assign-busses [IA-32] Always assign all PCI bus |
1026 | numbers ourselves, overriding |
1027 | whatever the firmware may have |
1028 | done. |
1029 | usepirqmask [IA-32] Honor the possible IRQ mask |
1030 | stored in the BIOS $PIR table. This is |
1031 | needed on some systems with broken |
1032 | BIOSes, notably some HP Pavilion N5400 |
1033 | and Omnibook XE3 notebooks. This will |
1034 | have no effect if ACPI IRQ routing is |
1035 | enabled. |
1036 | noacpi [IA-32] Do not use ACPI for IRQ routing |
1037 | or for PCI scanning. |
1038 | routeirq Do IRQ routing for all PCI devices. |
1039 | This is normally done in pci_enable_device(), |
1040 | so this option is a temporary workaround |
1041 | for broken drivers that don't call it. |
1042 | |
1043 | firmware [ARM] Do not re-enumerate the bus but |
1044 | instead just use the configuration |
1045 | from the bootloader. This is currently |
1046 | used on IXP2000 systems where the |
1047 | bus has to be configured a certain way |
1048 | for adjunct CPUs. |
1049 | |
1050 | pcmv= [HW,PCMCIA] BadgePAD 4 |
1051 | |
1052 | pd. [PARIDE] |
1053 | See Documentation/paride.txt. |
1054 | |
1055 | pdcchassis= [PARISC,HW] Disable/Enable PDC Chassis Status codes at |
1056 | boot time. |
1057 | Format: { 0 | 1 } |
1058 | See arch/parisc/kernel/pdc_chassis.c |
1059 | |
1060 | pf. [PARIDE] |
1061 | See Documentation/paride.txt. |
1062 | |
1063 | pg. [PARIDE] |
1064 | See Documentation/paride.txt. |
1065 | |
1066 | pirq= [SMP,APIC] Manual mp-table setup |
1067 | See Documentation/i386/IO-APIC.txt. |
1068 | |
1069 | plip= [PPT,NET] Parallel port network link |
1070 | Format: { parport<nr> | timid | 0 } |
1071 | See also Documentation/parport.txt. |
1072 | |
1073 | pnpacpi= [ACPI] |
1074 | { off } |
1075 | |
1076 | pnpbios= [ISAPNP] |
1077 | { on | off | curr | res | no-curr | no-res } |
1078 | |
1079 | pnp_reserve_irq= |
1080 | [ISAPNP] Exclude IRQs for the autoconfiguration |
1081 | |
1082 | pnp_reserve_dma= |
1083 | [ISAPNP] Exclude DMAs for the autoconfiguration |
1084 | |
1085 | pnp_reserve_io= [ISAPNP] Exclude I/O ports for the autoconfiguration |
1086 | Ranges are in pairs (I/O port base and size). |
1087 | |
1088 | pnp_reserve_mem= |
1089 | [ISAPNP] Exclude memory regions for the autoconfiguration |
1090 | Ranges are in pairs (memory base and size). |
1091 | |
1092 | profile= [KNL] Enable kernel profiling via /proc/profile |
1093 | { schedule | <number> } |
1094 | (param: schedule - profile schedule points} |
1095 | (param: profile step/bucket size as a power of 2 for |
1096 | statistical time based profiling) |
1097 | |
1098 | processor.max_cstate= [HW, ACPI] |
1099 | Limit processor to maximum C-state |
1100 | max_cstate=9 overrides any DMI blacklist limit. |
1101 | |
1102 | prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk |
1103 | before loading. |
1104 | See Documentation/ramdisk.txt. |
1105 | |
1106 | psmouse.proto= [HW,MOUSE] Highest PS2 mouse protocol extension to |
1107 | probe for (bare|imps|exps). |
1108 | psmouse.rate= [HW,MOUSE] Set desired mouse report rate, in reports |
1109 | per second. |
1110 | psmouse.resetafter= |
1111 | [HW,MOUSE] Try to reset the device after so many bad packets |
1112 | (0 = never). |
1113 | psmouse.resolution= |
1114 | [HW,MOUSE] Set desired mouse resolution, in dpi. |
1115 | psmouse.smartscroll= |
1116 | [HW,MOUSE] Controls Logitech smartscroll autorepeat, |
1117 | 0 = disabled, 1 = enabled (default). |
1118 | |
1119 | pss= [HW,OSS] Personal Sound System (ECHO ESC614) |
1120 | Format: <io>,<mss_io>,<mss_irq>,<mss_dma>,<mpu_io>,<mpu_irq> |
1121 | |
1122 | pt. [PARIDE] |
1123 | See Documentation/paride.txt. |
1124 | |
1125 | quiet= [KNL] Disable log messages |
1126 | |
1127 | r128= [HW,DRM] |
1128 | |
1129 | raid= [HW,RAID] |
1130 | See Documentation/md.txt. |
1131 | |
1132 | ramdisk= [RAM] Sizes of RAM disks in kilobytes [deprecated] |
1133 | See Documentation/ramdisk.txt. |
1134 | |
1135 | ramdisk_blocksize= |
1136 | [RAM] |
1137 | See Documentation/ramdisk.txt. |
1138 | |
1139 | ramdisk_size= [RAM] Sizes of RAM disks in kilobytes |
1140 | New name for the ramdisk parameter. |
1141 | See Documentation/ramdisk.txt. |
1142 | |
1143 | reboot= [BUGS=IA-32,BUGS=ARM,BUGS=IA-64] Rebooting mode |
1144 | Format: <reboot_mode>[,<reboot_mode2>[,...]] |
1145 | See arch/*/kernel/reboot.c. |
1146 | |
1147 | reserve= [KNL,BUGS] Force the kernel to ignore some iomem area |
1148 | |
1149 | resume= [SWSUSP] Specify the partition device for software suspension |
1150 | |
1151 | rhash_entries= [KNL,NET] |
1152 | Set number of hash buckets for route cache |
1153 | |
1154 | riscom8= [HW,SERIAL] |
1155 | Format: <io_board1>[,<io_board2>[,...<io_boardN>]] |
1156 | |
1157 | ro [KNL] Mount root device read-only on boot |
1158 | |
1159 | root= [KNL] Root filesystem |
1160 | |
1161 | rootdelay= [KNL] Delay (in seconds) to pause before attempting to |
1162 | mount the root filesystem |
1163 | |
1164 | rootflags= [KNL] Set root filesystem mount option string |
1165 | |
1166 | rootfstype= [KNL] Set root filesystem type |
1167 | |
1168 | rw [KNL] Mount root device read-write on boot |
1169 | |
1170 | S [KNL] Run init in single mode |
1171 | |
1172 | sa1100ir [NET] |
1173 | See drivers/net/irda/sa1100_ir.c. |
1174 | |
1175 | sb= [HW,OSS] |
1176 | Format: <io>,<irq>,<dma>,<dma2> |
1177 | |
1178 | sbni= [NET] Granch SBNI12 leased line adapter |
1179 | |
1180 | sbpcd= [HW,CD] Soundblaster CD adapter |
1181 | Format: <io>,<type> |
1182 | See a comment before function sbpcd_setup() in |
1183 | drivers/cdrom/sbpcd.c. |
1184 | |
1185 | sc1200wdt= [HW,WDT] SC1200 WDT (watchdog) driver |
1186 | Format: <io>[,<timeout>[,<isapnp>]] |
1187 | |
1188 | scsi_debug_*= [SCSI] |
1189 | See drivers/scsi/scsi_debug.c. |
1190 | |
1191 | scsi_default_dev_flags= |
1192 | [SCSI] SCSI default device flags |
1193 | Format: <integer> |
1194 | |
1195 | scsi_dev_flags= [SCSI] Black/white list entry for vendor and model |
1196 | Format: <vendor>:<model>:<flags> |
1197 | (flags are integer value) |
1198 | |
1199 | scsi_logging= [SCSI] |
1200 | |
1201 | selinux [SELINUX] Disable or enable SELinux at boot time. |
1202 | Format: { "0" | "1" } |
1203 | See security/selinux/Kconfig help text. |
1204 | 0 -- disable. |
1205 | 1 -- enable. |
1206 | Default value is set via kernel config option. |
1207 | If enabled at boot time, /selinux/disable can be used |
1208 | later to disable prior to initial policy load. |
1209 | |
1210 | serialnumber [BUGS=IA-32] |
1211 | |
1212 | sg_def_reserved_size= |
1213 | [SCSI] |
1214 | |
1215 | sgalaxy= [HW,OSS] |
1216 | Format: <io>,<irq>,<dma>,<dma2>,<sgbase> |
1217 | |
1218 | shapers= [NET] |
1219 | Maximal number of shapers. |
1220 | |
1221 | sim710= [SCSI,HW] |
1222 | See header of drivers/scsi/sim710.c. |
1223 | |
1224 | simeth= [IA-64] |
1225 | simscsi= |
1226 | |
1227 | sjcd= [HW,CD] |
1228 | Format: <io>,<irq>,<dma> |
1229 | See header of drivers/cdrom/sjcd.c. |
1230 | |
1231 | slram= [HW,MTD] |
1232 | |
1233 | smart2= [HW] |
1234 | Format: <io1>[,<io2>[,...,<io8>]] |
1235 | |
1236 | snd-ad1816a= [HW,ALSA] |
1237 | |
1238 | snd-ad1848= [HW,ALSA] |
1239 | |
1240 | snd-ali5451= [HW,ALSA] |
1241 | |
1242 | snd-als100= [HW,ALSA] |
1243 | |
1244 | snd-als4000= [HW,ALSA] |
1245 | |
1246 | snd-azt2320= [HW,ALSA] |
1247 | |
1248 | snd-cmi8330= [HW,ALSA] |
1249 | |
1250 | snd-cmipci= [HW,ALSA] |
1251 | |
1252 | snd-cs4231= [HW,ALSA] |
1253 | |
1254 | snd-cs4232= [HW,ALSA] |
1255 | |
1256 | snd-cs4236= [HW,ALSA] |
1257 | |
1258 | snd-cs4281= [HW,ALSA] |
1259 | |
1260 | snd-cs46xx= [HW,ALSA] |
1261 | |
1262 | snd-dt019x= [HW,ALSA] |
1263 | |
1264 | snd-dummy= [HW,ALSA] |
1265 | |
1266 | snd-emu10k1= [HW,ALSA] |
1267 | |
1268 | snd-ens1370= [HW,ALSA] |
1269 | |
1270 | snd-ens1371= [HW,ALSA] |
1271 | |
1272 | snd-es968= [HW,ALSA] |
1273 | |
1274 | snd-es1688= [HW,ALSA] |
1275 | |
1276 | snd-es18xx= [HW,ALSA] |
1277 | |
1278 | snd-es1938= [HW,ALSA] |
1279 | |
1280 | snd-es1968= [HW,ALSA] |
1281 | |
1282 | snd-fm801= [HW,ALSA] |
1283 | |
1284 | snd-gusclassic= [HW,ALSA] |
1285 | |
1286 | snd-gusextreme= [HW,ALSA] |
1287 | |
1288 | snd-gusmax= [HW,ALSA] |
1289 | |
1290 | snd-hdsp= [HW,ALSA] |
1291 | |
1292 | snd-ice1712= [HW,ALSA] |
1293 | |
1294 | snd-intel8x0= [HW,ALSA] |
1295 | |
1296 | snd-interwave= [HW,ALSA] |
1297 | |
1298 | snd-interwave-stb= |
1299 | [HW,ALSA] |
1300 | |
1301 | snd-korg1212= [HW,ALSA] |
1302 | |
1303 | snd-maestro3= [HW,ALSA] |
1304 | |
1305 | snd-mpu401= [HW,ALSA] |
1306 | |
1307 | snd-mtpav= [HW,ALSA] |
1308 | |
1309 | snd-nm256= [HW,ALSA] |
1310 | |
1311 | snd-opl3sa2= [HW,ALSA] |
1312 | |
1313 | snd-opti92x-ad1848= |
1314 | [HW,ALSA] |
1315 | |
1316 | snd-opti92x-cs4231= |
1317 | [HW,ALSA] |
1318 | |
1319 | snd-opti93x= [HW,ALSA] |
1320 | |
1321 | snd-pmac= [HW,ALSA] |
1322 | |
1323 | snd-rme32= [HW,ALSA] |
1324 | |
1325 | snd-rme96= [HW,ALSA] |
1326 | |
1327 | snd-rme9652= [HW,ALSA] |
1328 | |
1329 | snd-sb8= [HW,ALSA] |
1330 | |
1331 | snd-sb16= [HW,ALSA] |
1332 | |
1333 | snd-sbawe= [HW,ALSA] |
1334 | |
1335 | snd-serial= [HW,ALSA] |
1336 | |
1337 | snd-sgalaxy= [HW,ALSA] |
1338 | |
1339 | snd-sonicvibes= [HW,ALSA] |
1340 | |
1341 | snd-sun-amd7930= |
1342 | [HW,ALSA] |
1343 | |
1344 | snd-sun-cs4231= [HW,ALSA] |
1345 | |
1346 | snd-trident= [HW,ALSA] |
1347 | |
1348 | snd-usb-audio= [HW,ALSA,USB] |
1349 | |
1350 | snd-via82xx= [HW,ALSA] |
1351 | |
1352 | snd-virmidi= [HW,ALSA] |
1353 | |
1354 | snd-wavefront= [HW,ALSA] |
1355 | |
1356 | snd-ymfpci= [HW,ALSA] |
1357 | |
1358 | sonicvibes= [HW,OSS] |
1359 | Format: <reverb> |
1360 | |
1361 | sonycd535= [HW,CD] |
1362 | Format: <io>[,<irq>] |
1363 | |
1364 | sonypi.*= [HW] Sony Programmable I/O Control Device driver |
1365 | See Documentation/sonypi.txt |
1366 | |
1367 | specialix= [HW,SERIAL] Specialix multi-serial port adapter |
1368 | See Documentation/specialix.txt. |
1369 | |
1370 | spia_io_base= [HW,MTD] |
1371 | spia_fio_base= |
1372 | spia_pedr= |
1373 | spia_peddr= |
1374 | |
1375 | sscape= [HW,OSS] |
1376 | Format: <io>,<irq>,<dma>,<mpu_io>,<mpu_irq> |
1377 | |
1378 | st= [HW,SCSI] SCSI tape parameters (buffers, etc.) |
1379 | See Documentation/scsi/st.txt. |
1380 | |
1381 | st0x= [HW,SCSI] |
1382 | See header of drivers/scsi/seagate.c. |
1383 | |
1384 | sti= [PARISC,HW] |
1385 | Format: <num> |
1386 | Set the STI (builtin display/keyboard on the HP-PARISC |
1387 | machines) console (graphic card) which should be used |
1388 | as the initial boot-console. |
1389 | See also comment in drivers/video/console/sticore.c. |
1390 | |
1391 | sti_font= [HW] |
1392 | See comment in drivers/video/console/sticore.c. |
1393 | |
1394 | stifb= [HW] |
1395 | Format: bpp:<bpp1>[:<bpp2>[:<bpp3>...]] |
1396 | |
1397 | stram_swap= [HW,M68k] |
1398 | |
1399 | swiotlb= [IA-64] Number of I/O TLB slabs |
1400 | |
1401 | switches= [HW,M68k] |
1402 | |
1403 | sym53c416= [HW,SCSI] |
1404 | See header of drivers/scsi/sym53c416.c. |
1405 | |
1406 | t128= [HW,SCSI] |
1407 | See header of drivers/scsi/t128.c. |
1408 | |
1409 | tdfx= [HW,DRM] |
1410 | |
1411 | thash_entries= [KNL,NET] |
1412 | Set number of hash buckets for TCP connection |
1413 | |
1414 | time Show timing data prefixed to each printk message line |
1415 | |
1416 | tipar.timeout= [HW,PPT] |
1417 | Set communications timeout in tenths of a second |
1418 | (default 15). |
1419 | |
1420 | tipar.delay= [HW,PPT] |
1421 | Set inter-bit delay in microseconds (default 10). |
1422 | |
1423 | tmc8xx= [HW,SCSI] |
1424 | See header of drivers/scsi/seagate.c. |
1425 | |
1426 | tmscsim= [HW,SCSI] |
1427 | See comment before function dc390_setup() in |
1428 | drivers/scsi/tmscsim.c. |
1429 | |
1430 | tp720= [HW,PS2] |
1431 | |
1432 | trix= [HW,OSS] MediaTrix AudioTrix Pro |
1433 | Format: <io>,<irq>,<dma>,<dma2>,<sb_io>,<sb_irq>,<sb_dma>,<mpu_io>,<mpu_irq> |
1434 | |
1435 | tsdev.xres= [TS] Horizontal screen resolution. |
1436 | tsdev.yres= [TS] Vertical screen resolution. |
1437 | |
1438 | turbografx.map[2|3]= |
1439 | [HW,JOY] TurboGraFX parallel port interface |
1440 | Format: <port#>,<js1>,<js2>,<js3>,<js4>,<js5>,<js6>,<js7> |
1441 | See also Documentation/input/joystick-parport.txt |
1442 | |
1443 | u14-34f= [HW,SCSI] UltraStor 14F/34F SCSI host adapter |
1444 | See header of drivers/scsi/u14-34f.c. |
1445 | |
1446 | uart401= [HW,OSS] |
1447 | Format: <io>,<irq> |
1448 | |
1449 | uart6850= [HW,OSS] |
1450 | Format: <io>,<irq> |
1451 | |
1452 | usb-handoff [HW] Enable early USB BIOS -> OS handoff |
1453 | |
1454 | usbhid.mousepoll= |
1455 | [USBHID] The interval which mice are to be polled at. |
1456 | |
1457 | video= [FB] Frame buffer configuration |
1458 | See Documentation/fb/modedb.txt. |
1459 | |
1460 | vga= [BOOT,IA-32] Select a particular video mode |
1461 | See Documentation/i386/boot.txt and Documentation/svga.txt. |
1462 | Use vga=ask for menu. |
1463 | This is actually a boot loader parameter; the value is |
1464 | passed to the kernel using a special protocol. |
1465 | |
1466 | vmalloc=nn[KMG] [KNL,BOOT] forces the vmalloc area to have an exact |
1467 | size of <nn>. This can be used to increase the |
1468 | minimum size (128MB on x86). It can also be used to |
1469 | decrease the size and leave more room for directly |
1470 | mapped kernel RAM. |
1471 | |
1472 | vmhalt= [KNL,S390] |
1473 | |
1474 | vmpoff= [KNL,S390] |
1475 | |
1476 | waveartist= [HW,OSS] |
1477 | Format: <io>,<irq>,<dma>,<dma2> |
1478 | |
1479 | wd33c93= [HW,SCSI] |
1480 | See header of drivers/scsi/wd33c93.c. |
1481 | |
1482 | wd7000= [HW,SCSI] |
1483 | See header of drivers/scsi/wd7000.c. |
1484 | |
1485 | wdt= [WDT] Watchdog |
1486 | See Documentation/watchdog/watchdog.txt. |
1487 | |
1488 | xd= [HW,XT] Original XT pre-IDE (RLL encoded) disks. |
1489 | xd_geo= See header of drivers/block/xd.c. |
1490 | |
1491 | xirc2ps_cs= [NET,PCMCIA] |
1492 | Format: <irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]] |
1493 | |
1494 | |
1495 | |
1496 | Changelog: |
1497 | |
1498 | The last known update (for 2.4.0) - the changelog was not kept before. |
1499 | 2000-06-?? Mr. Unknown |
1500 | |
1501 | Update for 2.5.49, description for most of the options introduced, |
1502 | references to other documentation (C files, READMEs, ..), added S390, |
1503 | PPC, SPARC, MTD, ALSA and OSS category. Minor corrections and |
1504 | reformatting. |
1505 | 2002-11-24 Petr Baudis <pasky@ucw.cz> |
1506 | Randy Dunlap <randy.dunlap@verizon.net> |
1507 | |
1508 | TODO: |
1509 | |
1510 | Add documentation for ALSA options. |
1511 | Add more DRM drivers. |