I'm trying to create a multiboot live pendrive that works under EFI/UEFI setup. This should be a really straightforward process, since you just need to: - create the GPT partition table on the pendrive - create the ESP partition and format it using fat32, - create one additional partition for each ISO file - install rEFInd and its ISO driver in the ESP partition - copy via dd each ISO file to its corresponding device /dev/sdb1, sdb2, etc) So the task is really easy to do, but for some reason not all images work well with this setup. Here's how the pendrive's partition layout looks like: # lsblk /dev/sdb NAME SIZE FSTYPE TYPE LABEL MOUNTPOINT UUID sdb 28.9G disk ├─sdb1 100M vfat part SD_ESP AD3E-8645 ├─sdb2 3G iso9660 part Ubuntu 18.04.4 LTS amd64 2020-02-03-18-40-13-00 ├─sdb3 3G iso9660 part Ubuntu 19.10 amd64 2019-10-17-12-53-34-00 ├─sdb4 3G iso9660 part d-live 10.3.0 gn amd64 2020-02-08-12-48-50-00 ├─sdb5 3G iso9660 part d-live 10.3.0 ma amd64 2020-02-08-12-47-49-00 ├─sdb6 3G ext4 part 1714184a-f3c2-405d-988c-815d0f7fe107 ├─sdb7 3G ext4 part 6ad21575-730b-424e-8bcf-7ce691ffcbfa ├─sdb8 1000M iso9660 part GParted-live 2019-09-03-06-21-27-00 We have two Ubuntu images -- they both work just fine. I can choose whichever Ubuntu live system I prefer to boot from in the rEFInd boot menu. The next two are the Debian images (gnome and mate downloaded from here[1]). In the above configuration, when I choose either one of the Debian images, the Gparted live boots instead... When I remove the GParted-live partition, then the Debian Gnome boots, and works well, but I'm unable to boot from Debian Mate. When I choose Debian Mate image, then Debian Gnome boots instead... Any ideas why the two Ubuntu images work and the Debian's don't? [1]: https://cdimage.debian.org/debian-cd/current-live/amd64/bt-hybrid/
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