I'm new here on the forum.Old PC MBR, no UEFI.The title is telling but the forum doesn't seem to have a clue what's going on.I have run into all kinds of trouble due to old PC with MBR.Ubuntu seems to have missed telling everyone with an old PC that has MBR.Unlucky I didn't find below before my attempt.
Quote found online:
"Ubuntu 24.04 LTS Installation."Before using UEFI, the disk partition style must be set to GPT.
When trying to upgrade.... Catastrophe PC dead....
22.04 has grub
24.04 has grub2
They don't work well together, hence black screen with only memtest to choose.I tried Boot-Repair several times, but it crashed.I restored to 22.04.5 LTS, all och.Waiting for response from Ubuntu, nothing yet.