Public bug reported:
Once again trying to build my multi-boot flash drives and external SSDs
with the latest Ubuntu.
Contents of the ISO to a FAT32-formatted flash drive. Boot in UEFI mode
and install grub to allow also booting in legacy mode. 20.04 works.
20.10 fails. Test machine: ThinkPad X1 Yoga Gen 5.
20.04:
ubuntu@ubuntu:~$ sudo su
root@ubuntu:/home/ubuntu# mount -o remount rw /cdrom
root@ubuntu:/home/ubuntu# grub-install --force --no-floppy
--boot-directory=/cdrom/boot /dev/sda
Installing for i386-pc platform.
Installation finished. No error reported.
root@ubuntu:/home/ubuntu#
20.10:
ubuntu@ubuntu:~$ sudo su
root@ubuntu:/home/ubuntu# mount -o remount rw /cdrom
root@ubuntu:/home/ubuntu# grub-install --force --no-floppy
--boot-directory=/cdrom/boot /dev/sda
Installing for x86_64-efi platform.
grub-install: error: cannot find EFI directory.
root@ubuntu:/home/ubuntu#
I realize that live boot isn't a priority other than compatibility testing and
installation but this constant breakage (persistence, looped ISO booting...)
makes my intended use impossible. Multiboot external drives with Ubuntu as the
base distro are very useful for recovery and forensics - when they work...
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1902557
Title:
20.10 grub-install failure
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