Comment 41 for bug 1906476

If the issue doesn't affect hirsute then it should be possible to update an impish system by chroot from hirsute media, I would think.

I've been booting up only occasionally this past week when I need to access something, but I find that apt, or possibly initramfs, updates seem to trigger the issue for me and render my system unbootable. I've been recovering with zfs rollback from hirsute media. Unfortunately, something also seems to go wrong with the zsys recovery entries in grub, where I end up with a dataset called rpool/ROOT/ubuntu_ (no trailing unique ID). I'll file that as a separate bug if it persists after this is resolved, though.

Anyway, I plan to try to chroot and update later and I'll report back.