Hi, sudodus wrote: > I also tested the tweak in comment #15 on the current Ubuntu Groovy iso file. > When cloned the USB drive fails to boot the Lenovo V130, > ... > $ sudo gdisk test_mbr.iso > MBR: MBR only
Obviously the production of "test_mbr.iso" did what the file name says and made a MBR partition table. Your reported run in comment #15 is supposed to produce GPT for the Lenovos. > Anyway, the tweak in comment #21 failed for me. That one is aimed to produce an MBR table in order to let Chris Guiver test whether this works with his HPs. We know that this does not work for the Lenovos. > maybe because something is 'set twice'. Hardly. If settings in xorriso are in conflict, the later command overrides the setting of the earlier command. E.g. in the comment #15 with groovy-desktop-amd64_20201010_gpt.iso as base -boot_image any replay sets appended_part_as=mbr, but the later command -boot_image any appended_part_as=gpt overrides this. When the production of the ISO filesystem begins, the setting is "gpt". > Please notice that the option -compliance no_emul_toc may cause problems. Do you have any tangible indications for this (beyond the fact that MBR table does not work for the Lenovos) ? > Would it be useful for you, if I upload the modified iso file It would suffice to show the exact xorriso run arguments, the URL of the original ISO, and the inspecting program runs of xorriso or partition editors with their results. ------------------------------------------------------------------------- Whatever, we need to know whether Chris' hp dc7700 and hp dc7700 boot by an MBR partition table. See comment #21. Further we need confirmation that they still not boot with the newest daily groovy ISO. (The one with GPT which has the boot flag attributed to a nearly non-existing second MBR partition.) If it turns out that the HPs only boot via MBR table, and if Ubuntu still wants to have its ISO booting on those machines and on Lenovos, then i fear that two ISO variations are needed: - For most machines: GPT without that fabricated boot flag, which is a hack that is barely UEFI specs compliant. - For the HPs and maybe other old machines: MBR partition table. (That variant has a boot flag by default.) Most machines will work with both ISOs. As said, Debian does similar for machines which are allergic to the normal Debian EFI boot equipment. (The "mac" netboot ISOs are simply BIOS-only. No special Apple parts inside.) If only a single ISO is possible, then it should stay as it is now (GPT and boot flag hack) which tosses some of the HPs out of the game. (We now know how a user can repack that ISO to a HP-friendly one.) 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
