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I'm using Ubuntu 9.1 server edition, I get this error during boot time after I ran sudo apt-get upgrade

when checking my kernel version, uname -r
returns 2.6.31-14-generic

but when i run dpkg -l 'linux-image*' | grep ^.i
I cannot find 2.6.31-14 (only contains 2.6.32*)

Following the solution in the thread: Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) doesn't work for me

I'm running the commands inside the Rescue mode by booting from the Ubuntu 9.1 Installation Disc

Do I need to update my kernel and run update-initramfs + update-grub again? If so, how can I update the kernel? apt-get install any linux-headers/image cannot change the uname -r value

Thanks!

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9.10 reached end of life in april of 2011. It has not had any updates since that time. You need to upgrade to a supported release. You should still be able to boot a previous kernel version. – psusi Mar 19 '12 at 13:32
may i ask how can i boot with a previous kernel version? – vk.edward.li Mar 19 '12 at 16:55
By choosing it from the grub boot menu of course. – psusi Mar 19 '12 at 17:35
I've edited GRUB_TIMEOUT=-1 & GRUB_HIDDEN_TIMEOUT=0 (update-grub executed), but the grub boot menu still doesn't show and the same error occur, what button should I press or how should I open the grub menu? Thanks for your help! – vk.edward.li Mar 20 '12 at 4:25
Hold down shift – psusi Mar 20 '12 at 4:30

closed as too localized by Luis Alvarado♦ Mar 19 at 1:03

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