boot loop after upgrade to 22.04 from 21.10

[Andrew]

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.

[Chris Guiver (guiverc)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

apport-collect 1978243

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

(If you can't login you'll have difficulties with the apport-collect, but it's not clear to me if you've tried recovery mode, runlevel 1 etc.)

Bug reporting is about finding & fixing problems thus preventing future users from hitting the same bug. You possibly could benefit more with support.

I believe a Support site would be more appropriate, eg. https://answers.launchpad.net/ubuntu (this bug report can be converted to a question (which is aimed at support)). You can also find help with your problem in the support forum of your local Ubuntu community http://loco.ubuntu.com/ or asking at https://askubuntu.com or https://ubuntuforums.org, or for more support options please look at https://discourse.ubuntu.com/t/community-support/709

[Andrew (ashlykov-v)]

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 ?

[Andrew (ashlykov-v)]

I've used efibootmgr with --disable-verification. Now I get two messages :
insecure mode
System reset
and then it reboots ...

efibootmgr -v had many (over 30) ubuntu entries, might be created during attempts to re-install ubuntu 22.04. I've removed all the duplicate entries.

Existing ubuntu entry has correct disk UUID and path pointing to shim file on EFI partition under ubuntu folder.

[Andrew (ashlykov-v)]

I've resolved issue by removing and re-creating UEFI entry for ubuntu using efibootmgr.

[lotuspsychje (lotuspsychje)]

If you feel this bug has been resolved
and no longer a bug anymore
please set the status to 'invalid'