Index: grubby/new-kernel-pkg
===================================================================
--- grubby/new-kernel-pkg	(Revision 3155)
+++ grubby/new-kernel-pkg	(Arbeitskopie)
@@ -274,7 +274,7 @@
 	rootdevice=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $1; }}' /etc/fstab  2>/dev/null)
 	if [[ -z $rootdevice ]]
 	then
-		rootdevice=$(grep -o -P "(?<=root=)\S+" /proc/cmdline)
+		rootdevice=$(grep "root=" /proc/cmdline | sed 's:.*root=\(.*\).*:\1:' | cut -d' ' -f1)
 	fi
 
 	if [[ -n ${mbkernel} ]] && [[ -n ${cfgLilo} ]] && [[ ${liloFlag} != elilo ]]