Update - a BIOS upgrade fixed this for me. HP Pavilion All-in-One - 23-q199na. Perhaps this cleared the NVRAM.
sudo apt -f install resulted in: W: APT had planned for dpkg to do more than it reported back (0 vs 4). Affected packages: shim-signed:amd64 and was fixed with a reinstall sudo apt install --reinstall shim-signed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1776271 Title: Could not prepare Boot variable: No space left on device (package shim-signed 1.34.9+13-0ubuntu2 [origin: Ubuntu] failed to install/upgrade: Unterprozess installed shim-signed package post- installation script gab den Fehler-Ausgangsstatus 1 zurück) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1776271/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
