Kernel 2.6.25.10-86 can't find root on lvm

[sean darcy]

Jorgen Jonsson wrote:
> On Thu, 10 Jul 2008 05:37:04 -0400, David C. Chipman wrote:
> 
>> Hi Jorgen,
>>
>> 		Here are the two kernel lines from your grub
>> configuration:
>>
>>>     kernel /vmlinuz-2.6.25.10-86.fc9.i686 ro root=/dev/dm-0 quiet
>>> usbcore.au tosuspend=1 agp=off agppart=off
>>>     kernel /vmlinuz-2.6.25.10-85.fc9.i686 ro
>>> root=UUID=27915760-e016-4843-9d 85-6642e29dc74c quiet
>> I notice that the data passed with the root option is different in both
>> cases. I notice that the kernel line for the newer kernel points to a
>> device file, while your root option for the working kernel passes a
>> string of letters and numbers. *First of all*: Back up your
>> "/boot/grub/grub.conf" file.  Try copying the string of letters and
>> numbers from the working kernel line, and replace the device file name
>> with the letters and numbers. Good luck,
>>
>> 			-David Chipman
>>
>> 			PS: You might try posting a bugzilla entry in
>> the Fedora Bugzilla system about this.
> 
> As I said in my post, I've tried with the UUID root line, still gets 
> can't find /dev/root
> 
You might try making a new initrd:  mkinitrd -o myinitrd ...

As far as I can tell, initrd seems to have some control over /dev/root.

sean