I have very recently updated from 20.04 to 22.04.1 LTS on my HP elitebook 840 G8 through sudo do-release-upgrade.
The installation looked correct but when it asked me to reboot I could never access the GUI anymore.
The system is apparently on 22.04 as the lsb release -a gives me the output I expect (Description: Ubuntu 22.04.1 LTS).
When I start the GUI from a command line sudo systemctl isolate graphical it gives me this error: mtd device must be supplied (device name is empty).
Additionally when I run the dmesg it gives me an error Could not resolve symbol [\TZ. ETMD]. I am on a fully updated UEFI BIOS.
I also tried the usual sudo apt-get clean, sudo apt-get update. The update works but gives me some warnings about jammy not having the resource "stella.cmit" available.
Can someone explain to me what is going on, please? I am completely lost.