On Tue, 2009-02-03 at 15:39 +0200, Paolo Supino wrote: > Hi > Here's my /boot/grub/grub.conf content: > grub.conf generated by anaconda > # > # Note that you do not have to rerun grub after making changes to this > file > # NOTICE: You do not have a /boot partition. This means that > # all kernel and initrd paths are relative to /, eg. > # root (hd0,0) > # kernel /boot/vmlinuz-version ro > root=/dev/mapper/sil_aibhcbccdhagp1 > # initrd /boot/initrd-version.img > #boot=/dev/mapper/sil_aibhcbccdhag > default=0 > timeout=10 > splashimage=(hd0,0)/boot/grub/splash.xpm.gz > hiddenmenu > title CentOS (2.6.18-92.1.22.el5) > root (hd0,0) > kernel /boot/vmlinuz-2.6.18-92.1.22.el5 ro root=LABEL=/ > pci=nommconf > initrd /boot/initrd-2.6.18-92.1.22.el5.img > title CentOS (2.6.18-92.el5) > root (hd0,0) > kernel /boot/vmlinuz-2.6.18-92.el5 ro root=LABEL=/ > pci=nommconf > initrd /boot/initrd-2.6.18-92.el5.img > > > As you can see there's no mentioning of "acpi=off" anywhere .... and > unless I stop it and change the command line parameter from acpi=off > to pci=nommconf it still boots with acpi=off ... :-( Sounds like your boot/root is not what you think it is. I had an LFS system I built long ago and added CentOS to it. It could be booted from either HD. I forgot to change my root= stuff in fstab when I finally converted fully. Took me awhile to figure out why changes I made had no effect on booting. I changed my root in fstab and all worked well after that. > <snip> HTH -- Bill