I updated from 18.04 LTS to 20.04 LTS and now my Desktop and the text in the toolbar have weird graphical glitches (see screenshot). They different every time I restart.
Does somebody have an idea what could be the problem and where I should start looking? My first guess would be that some module got removed accidentally but I wouldn't know which one.
I also tried to reinstall
xxx:~$ lspci -k | grep -EA3 'VGA|3D|Display' 00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07) DeviceName: Onboard IGD Subsystem: Hewlett-Packard Company UHD Graphics 620 Kernel driver in use: i915
Thank you for your help!