Hello Steve, thank you for your explanation. In my case I am quite sure, that my grub was correctly configured BEFORE the upgrade to 20.04. I am starting with an absolutely fresh installation of 18.04 which is working flawlessly and reboots without any problems.
I have tried the upgrade to 20.04 with several fresh installations and am always ending up with this grub-pc error. sudo dpkg-reconfigure grub-pc gives me this error: /usr/sbin/dpkg-reconfigure: grub-pc is broken or not fully installed I have tried to remove grub-pc and to install it again, which lets me choose the boot disk where grub should be located. This can be done without an error message, but after that my system is in an unbootable state. -- 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
