Unfortunately, this bug seems not fixed for me. I am using a remote server at 1&1 Hosting with a RAID 1 configuration and logical volumes (LVM). I am starting with a fresh image of Ubuntu 18.04 LTS. With do-release-upgrade I can upgrade to Ubuntu 20.04 LTS, but I am ending with this error:
Errors were encountered while processing: grub-pc Exception during pm.DoInstall(): E:Sub-process /usr/bin/dpkg returned an error code (1) After that my system is unusable. It cannot be updated, no packages can be installed. I can reboot, but when I try to fix the error with re- installing grub-pc it becomes unbootable. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891680 Title: grub-pc needs to detect when debconf points to invalid drive and stop in preinst, before unpacking files, and also treat this as a failure in postinst To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1891680/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs