I also confirm that I also had this problem on an HP Envy laptop after upgrading to Ubuntu 20.04.
@orlapa solution worked but first going to Legacy Boot Mode in BIOS as @awlsomealex said is very convenient to be able to boot first and then to edit the grub configuration. Thanks a lot ! -- 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