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I recently used the update manager to upgrade my laptop from Ubuntu 8 to 10.04 LTS. When I tried to reboot after the upgrade was complete, I got the message

kernel panic not syncing: vfs: unable to mount root FS on unknown block.

If I try to boot into recovery mode, I get the same problem.

I have browsed the forum and seen many similar problems and some suggested solutions, but before I try any of them I want to be sure that I won't be making things worse.

I can access all of the files on my disc by booting through an ubuntu live cd, but I'm not sure what I should be trying to repair.

Any suggestions?

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closed as too localized by Jorge Castro, Marco Ceppi Jun 9 '11 at 21:42

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

can you provide a link to what the forums suggest? –  RolandiXor Apr 4 '11 at 16:15
See for example, #38. I'm still looking for others. –  user13585 Apr 4 '11 at 18:12
@WinstonRoberts: are you using wubi? from what you describe, and from what is suggested on the forums, chrooting and rebuilding the kernel image might work. –  RolandiXor Apr 5 '11 at 2:26
No, I used the update manager available in Ubuntu. I'll see if this will work. –  user13585 Apr 5 '11 at 12:20
@WinstonRoberts: when I asked if you are using wubi, I mean if you installed ubuntu within windows –  RolandiXor Apr 5 '11 at 14:16