Thank you for taking the time to report this bug and helping to make Ubuntu better.
Lubuntu 18.04 LTS, being a flavor had only 3 years of supported life which has now ended - see https://lubuntu.me/bionic-eol/ The package this bug is filed against thus is out of support, and won't be fixed. I suspect your issue however is with a grub2 package, not a Lubuntu package, which would be still supported. If the package is changed to a supported package, I'd suggest performing the following (after package change is made of course). Please execute the following command only once, as it will automatically gather debugging information, in a terminal: apport-collect 1927853 When reporting bugs in the future please use apport by using 'ubuntu- bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1927853 Title: Update to grub 2.04-1ubuntu44 breaks booting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lubuntu-meta/+bug/1927853/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs