I keep lots of copies of the root partition in LVM managed logical volumes. There is a /boot/grub/grub.cfg file in each root partition. In the past, I was able to select which volume to use by default by running grub-install. After I upgraded to Eoan, this isn't working.
After looking at update-grub does not update /boot/efi/EFI/ubuntu/grub.cfg, I decided that this was probably how grub found the correct place to look for the real grub.cfg. I tried updating this file by hand but it had no effect. /boot/efi is mounted from a real partition (not managed by LVM),
UUID=1582-7C5D /boot/efi vfat umask=0077 0 1
Any ideas what to try?
