Hi, so the world might begin to split into incompatible camps. New Lenovos versus old HPs. Debian still has the "mac" amd64 ISOs which simply have no EFI equipment in order to please some old Apple machines: https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/
But this GPT allergy would have to be verified by repacking a GPT Ubuntu ISO to a MBR Ubuntu ISO which the Lenovos seem to hate. Continuing the repack endeavors of https://bugs.launchpad.net/ubuntu-cdimage/+bug/1886148/comments/174 one may do original=groovy-desktop-amd64_20201010_gpt.iso test -f test_mbr.iso && rm test_mbr.iso xorriso \ -indev "$original" \ -outdev test_mbr.iso \ -boot_image any replay \ -boot_image any appended_part_as=mbr Partition editors should report MBR/DOS partition table and boot flag $ /sbin/fdisk -l test_mbr.iso ... Disklabel type: dos ... Device Boot Start End Sectors Size Id Type test_mbr.iso1 * 64 5724655 5724592 2.7G 83 Linux test_mbr.iso2 5724656 5734607 9952 4.9M ef EFI (FAT-12/16/32) If this does not boot then it is not about MBR or boot flag, but about something else. If it boots, it's maybe only the addiction to MBR boot flags, for which there is a barely legal solution: One may create a pseudo partition with boot flag which is on the other side invisible enough not to disturb GPT recognition. test -r test_gpt_bootflag.iso && rm test_gpt_bootflag.iso xorriso \ -indev "$original" \ -outdev test_gpt_bootflag.iso \ -boot_image any replay \ -boot_image any appended_part_as=gpt \ -boot_image any mbr_force_bootable=on (If partition editors complain about some Protective MBR mismatch in test_gpt_bootflag.iso: I am investigating this. It happens only with replay runs. Let's hope it does not influence the outcome ot the test.) Have a nice day :) Thomas -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899308 Title: failure to boot groovy daily (again) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-cdimage/+bug/1899308/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
