Kernel Panic after latest update.

[brettdonahue]

Hi,

          I restarted my computer after updating it, then it appeared a "Kernel Panic" message: "Kernel panic - not syncing: VFS: unable to mount root fs on unknown-block (8,1)". It doesn't even start in recovery mode. Ubuntu is installed in Windows, with Wubi. I need help to know if I can solve this error without having to reinstall Ubuntu.

Steps to reproduce
* Select Ubuntu from Windows Boot Manager
* Select Current Version of kernel or Recovery Kernel
* Wait 2 seconds, Kernel Panic.

This is the error message:
[Linux-bzImage, setup=0x3400, size=0x3bef40]
[Initrd, addr=0x3782d000, size=0x7c2a54]
[1.971919] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,1)

Other information,
* I have an HP XW4600 (Standard factory configuration, no additional firmware updates)
* PC is running 64 bit Vista with a WUBI install 30GB
* Ubuntu version is 9.10
* Grub Version 1.97~beta4

These are the commands in grub:
insmod ntfs
set root=(hd0,1)
search --no-floppy --fs-uuid --set 9ee01c97e01c782b
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
linux /boot/vmlinuz-2.6.31-41-generic root=dev/sda1 loop=/ubuntu/disks/root.disk ro quiet splash
initrd /boot/initrd.img-2.6.31-14-generic

Any help is appreciated.
Brett

[Enran (enran21)]

 Hello I´m new in Ubuntu and I have the same problem that Brett after update, (Ubuntu 9.10 also installed by Wubi in Windows), but the message that I have is:

[1.314855] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,2)

One of the problems seems to be that the Current Version of kernel and the Recovery mode Kernel are the same (2.6.31-14):

Ubuntu, Linux 2.6.31-14-generic
Ubuntu, Linux 2.6.31-14-generic (recovery mode)

The recovery mode should be the previous -generic version (eg: 2.6.31-13), to start right before the update. Then I could start Ubuntu and solve the problem by removing the conflictive software.

Please HELP!!

[Enran (enran21)]

check for the possible solutions at:

https://bugs.launchpad.net/ubuntu/+bug/477169