[Bug 1978243] Re: boot loop after upgrade to 22.04 from 21.10

[Andrew]

I can't boot at all. It is rebooting before it even shows me grub boot menu. 
I can boot from live CD. 

My guess will be there is conflict between UEFI bios and grub files/keys.
But it was fine with 21.10 version of ubuntu and corresponding version of grub.

Are there any troubleshooting steps I can take or anything on EFI
partition to check ?

Would it help to downgrade grub version ?

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Title:
  boot loop after upgrade to 22.04 from 21.10

Status in grub2 package in Ubuntu:
  New

Bug description:
  Laptop Acer E5-575. Latest available version of bios.
  Worked fine with ubuntu 21.10 (and earlier versions).
  Upgraded to 22.04 via do-release-upgrade.
  Reboot after upgrade completed -> vendor logo -> black screen with "System reset" text for split second -> vendor logo -> black screen - endless loop.

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