This seems to be unique to the Q1900M board. I cobbled together another system with an ASRock 970 Extreme 3 motherboard, Athlon II CPU and 8GB RAM and the MATE UEFI install succeeded. Conversely a UEFI install of Lubuntu, which uses the Calamares installer also failed on the Q1900M system. So I don't know what the problem is but I know some things it is not. It is not the hard disk because the install failed with a different one. It is not memory size because it failed when I borrowed a memory stick from another machine to get 8GB on the Q1900M.
After making two backups of my home directory and the disk image of my target machine (An ASRock J5040-ITX board) I worked up the courage to try 24.04 MATE there and it succeeded. It appears this is a peculiar problem with my Q1900M test box (which had no problems with previous Ubuntu releases). If no one else is experiencing a similar problem I suggest we chalk this one up to no-see-ums and forget it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2063962 Title: 24.04 UEFI install fails, BIOS install succeeds To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/subiquity/+bug/2063962/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs