This bug seems to be similar to my own experiences, so I'm adding this comment to it.
After having my system upgraded yesterday (2009-01-30) using the package linux-image-2.6.22-16-generic_2.6.22-16.61_i386.deb, I found today that it was impossible to boot my computer. Upon selecting any entry in my grub boot menu, I got "Error 15: File not found". I looked at the commands in the grub command editor (by pressing E in the boot menu screen) and saw that the "root" definition was incorrect and the "UUID" for the "kernel" definition was also incorrect. These are the definitions I saw: root (hd0,5) kernel /boot/vmlinuz-2.6.22-16-generic root=UUID=20ae8580-c8c7-4c16-a436-181b9e38a3a7 ro quiet splash initrd /boot/initrd.img-2.6.22-16-generic I worked around this by setting "root" to "(hd0,0)" and by replacing the "UUID=..." with "/dev/sda1", removing the "quiet" and "splash" options so that I could actually see what happens, rather than seeing the Kubuntu progress bar and then seeing absolutely no detail when switching to text mode. Upon looking at /boot/grub, I saw that menu.lst and menu.lst~ were both updated yesterday and both were the same, so the update didn't preserve the old contents of menu.lst. I have now changed the contents of menu.lst back to what it was before. I have recently switched hard disks in my computer, and the layout of the partitions is different to those on my previous disk (which did use "(hd0,5)" as the root partition, along with the "UUID" shown above). However, I made sure to change menu.lst to use the new, correct values, and I had successfully booted several times before this error occurred today. It might be the case that some other file is used to retain details of the root partition and that the update scripts populate menu.lst with values from this other file, but it is very bad that the scripts just discard any existing copy of menu.lst, making an identical duplicate of the new, incorrect file, and if such special files with disk information then these should be documented somewhere. ** Tags added: grub menu menu.lst -- Unable to boot Ubuntu server after update/upgrade https://bugs.launchpad.net/bugs/321603 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