Running Fedora 29 with a Dell Precision M4700 and a Dell Pro2x dock. Has the K1000 Nvidia card. Under the 4.19 kernel I was able to have all 3 of my external monitors hooked up and working properly. Anytime I've tried booting into any 4.20 kernel, only my VGA monitor will display, and the other two are blank. Currently running the Nouveau drivers. I keep testing each 4.20 kernel that comes out but none of them have fixed the issue. Running on Gnome 3.30 under x11 if that matters.
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.
Created attachment 281081 [details] xorg log
Created attachment 281083 [details] dmesg log
Attached the logs, hopefully those help!
Doesn't seem like nouveau is loaded at all. Probably related to not being able to get anything to come up on those screens...
Created attachment 281085 [details] attachment-27340-0.html Anything else I can try to do? On Sat, Feb 9, 2019 at 12:57 PM <bugzilla-daemon@bugzilla.kernel.org> wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=202533 > > --- Comment #5 from Ilia Mirkin (imirkin@alum.mit.edu) --- > Doesn't seem like nouveau is loaded at all. Probably related to not being > able > to get anything to come up on those screens... > > -- > You are receiving this mail because: > You reported the bug.
You could try loading nouveau... or removing the configuration that is preventing it from loading...
Thanks for your patience. Figured out the error. For whatever reason, there was a blacklist file in /etc/modprobe.d/ that was blacklisting the nouveau drivers. 4.20 recognized the blacklist while 4.19 did not. Thanks for your direction!