I managed to solve the problem by setting 'Configure S-ATA as RAID' in the bios to 'Yes'. No idea why this works, because I have only on sata- drive and no raid.
The working IDE Configuration is: - Onboard IDE Operate Mode [Enhanced Mode] - Enhanced Mode Support On [S-ATA] - Configure S-ATA as RAID [Yes] - Serial ATA BOOTROM [Disabled] kernel: generic 2.6.20-6.11 -- kernel 2.6.20-5 doesn't boot with sata-hd https://launchpad.net/bugs/78288 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
