https://askubuntu.com/questions/1257667/upgrade-18-04-to-20-04-hangs-after-adding-boot-menu-entry-for-efi-firmware-conf
as is apparent from the link, there is at least one other person affected by this.
https:/ /askubuntu. com/questions/ 1257667/ upgrade- 18-04-to- 20-04-hangs- after-adding- boot-menu- entry-for- efi-firmware- conf
as is apparent from the link, there is at least one other person affected by this.