The error persists after a restart. This is not an expected bahaviour since the xserver is running then. The failed installation is announced at every run of update manager.
Also a (re-)configuration brings up this error: dpkg --configure -a OR dpkg --configure grub-pc dpkg: error processing package grub-pc (--configure): installed grub-pc package post-installation script subprocess returned error exit status 1 Errors were encountered while processing: grub-pc -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1849631 Title: package grub-pc 2.04-1ubuntu12 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1849631/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
