Like others have reported, I updated my Qubes system earlier today with
the 4.19.43 kernel along with the xen updates. Past updates have gone
smoothly for the duration of my running Qubes but unfortunately this one
wasn't.
The update itself installed fine with no issues or errors. I was able to
reboot successfully but when the system gets to the normal LightDM user
logon screen, the monitor output is garbled and has many artifacts. If I
attempt to log in, after a few seconds of the system attempting to start
up the Qubes Desktop, I get kicked back out to the login screen again.
The system will keep looping in such a manner.
I'm able to boot back into the system using the older 4.14.116 and
everything works again so I suspected the issue had to do with the
4.19.43 kernel and the system's graphics card.
I'm running an AMD processor with a Radeon R7 graphics card.
Upon searching Google, it appears that there are known issues with the
4.19.x kernels with certain AMD systems/cards.
For example:
https://bugs.freedesktop.org/show_bug.cgi?id=108981
https://forum.manjaro.org/t/upgrade-to-4-19-disables-my-amdgpu/64920/5
Seems that the 4.19.x branch was problematic with some AMD cards.
Since the graphics are borked and I can't get into the system with
4.19.x, what might be the best way to try to troubleshoot what the
specific issue might be?
Thanks in advance.
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