Comment 3 for bug 29858

I had this problem just after an apt-get dist-upgrade from breezy to dapper.

The problem seems to come from an incompatibility of the kernel 2.6.12 of breezy with the new udev (or something linked to the creation of dev node).

Anyway here is how I resolved it:

- Use the ubuntu install disk to boot, proceed to installation till partitionning screen, press ESC.
- Choose to open a shell in the menu.
- type :
modprobe dm-mod
vgchange -a y
mkdir t
mount /dev/mapper/Ubuntu-root /t
chroot t
mount /dev/hda1 /boot
apt-get install linux-image

This will install a 2.6.15 kernel from dapper. Reboot on this kernel. Voila it work.