Seems to be related to the virtualbox guest additions kernel moduls. Was able to restore grub via https://help.ubuntu.com/community/Grub2/Installing#via_ChRoot . Afterwards it was not possible to install the general kernel package. Only after I removed the virtualbox guest additions hwe I was able to install the new kernel that came with 19.10.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1848797 Title: After upgrading to 19.10, boot screen shows: "Error: symbol 'grub_file_filters' not found." To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1848797/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
