It is working for others, so we need more information. What kind of motherboard, BIOS, and disks does your system have? What version of grub worked, and how did you test it? Are you able to boot Ubuntu with that version?
It is working for others, so we need more information. What kind of
motherboard, BIOS, and disks does your system have? What version of grub
worked, and how did you test it? Are you able to boot Ubuntu with that version?