I'm having the same exact issue on HP EliteBook 8460p. Workarounds I found are downgrading to grub 2.02 from Bionic or upgrading to 2.04-5 from Debian.
** Attachment added: "apport.apport" https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1863434/+attachment/5328783/+files/apport.apport -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1863434 Title: 20.04 grub menu not visible To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1863434/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
