Comment 8 for bug 1867542

I removed all the zsys snapshots (had about 17), and then it booted fine. grub must have some trouble when there are many zfs snapshots. I tried removing only the last and rebooted, and it still wouldn't boot, but I didn't run update-grub, nor updated the initramfs, nor reinstalled grub, in that attempt.

Note that update-grub was listing the kernels from all those snapshots.