I have a situation where a system is running Debian 8 (GRUB2.02~beta2-22) on
btrfs. I then switch to a snapshot running Debian 10.3 (GRUB2.02+dfsg1-20) and
run grub-install and update-grub before rebooting - it boots 10.3 just fine.
When I switch back to the Deb8 snapshot, grub cannot find the
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Regards, John Little
I suspect your problem is the linux command in grub.cfg. There's a
"rootflags" phrase that with btrfs says which subvolume to use.
/etc/fstab in the snapshot has to have the correct entries, too.
However, the grub update mechanisms don't really cope with booting from
snapshots, and are prone to
