Comment 16 for bug 1883785

I have had this same problem with my Dell Inspiron 5593 since January 2020 when I was on 18.04. Upgrading to 20.04 in June 2020 resulted in no change of the behavior.

Neither workaround works for me. "rmmod tpm" in grub results in an error due to the module not being present.

Rebooting resolves the issue, usually within 3 attempts, however I have had to reboot 7 times more than once to get past the "you need to load the kernel first".

Waiting a few seconds before hitting enter when the grub boot selection screen appears seems to improve the chances of the boot working, but this is anecdotal and could be completely random.