The best solution may involve fixing grub-probe so it knows a ZFS filesystem. The attached patch is a simple workaround that worked on my 3 test systems.
For example if the patch is downloaded to /tmp/grub2.patch You can install the patch like this: cd /etc/grub.d; sudo patch < /tmp/grub2.patch ** Patch added: "Test fix to work around grub-probe failure" https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1894101/+attachment/5440778/+files/grub2.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1894101 Title: ubuntu 20.04.1 installed with zfs root fails to boot after installing xen-hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1894101/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
