https://bugzilla.kernel.org/show_bug.cgi?id=202533
Ilia Mirkin (imirkin@alum.mit.edu) changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |imirkin@alum.mit.edu
--- Comment #1 from Ilia Mirkin (imirkin@alum.mit.edu) --- There weren't a ton of changes to nouveau between 4.19 and 4.20. Can you do a bisect?
There were some changes to add support for HDMI 2.0, but only on GM20x GPUs (you have a GK10x GPU, which is earlier). And a handful of fixes to MST-related object lifetime management. It's likely that you have a MST dock, but those changes don't seem like they would cause anything that drastic.
Please include dmesg and xorg logs.