amrein Messages: 278 Registered: August 2008 Location: France
Experienced Member
I'm running Linux but not Ubuntu (Mandriva).
You didn't switch your hard drive cable or changed your bios boot configuration nor updated your motherboard bios I guess so:
- You had a kernel or bootloader update failure (before last rebooting)
- Or a disk failure
- Or you added bad boot parameters in your lilo or grub configuration file
Better to ask in a specialised Ubuntu forum. Most people run Windows here.