Sounds like bug 1844101. Although this bug is newer I feel the details in bug 1844101 are more useful.
** Tags added: eoan regression-release rls-ee-incoming -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1843860 Title: 5.3.0-10 doesn't boot on my t480s with secure boot enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1843860/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs