I think I have the same problem, however I am NOT using WUBI. I have Ubuntu installed directly onto the hard disk, but with all filesystems except /boot installed on an LVM.
The kernel panic only occurs with the latest kernel - 2.6.31-20-generic - but the system boots fine with the previous kernel 2.6.31-19-generic. The message being given is Kernel Panic - not syncing: VFS:unable to mount root fs on unknown block (0,0) -- After 9.10 grub update can not boot into Wubi install https://bugs.launchpad.net/bugs/477104 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs