Hi,
I am using Fedora 35 with KDE on an AMD 5800x and AMD 6800XT with a LG 27GP850-B 27 monitor. When I installed this with the Gnome desktop installer everything was working correctly. I recently decided to change to XFCE, before then switching to KDE and I followed Switching desktop environments :: Fedora Docs and everything worked correctly after switching to XFCE and then to KDE and finally removing Gnome.
Unfortunately the last 2 kernel upgrades, kernel-5.16.7-200.fc35.x86_64
and kernel-5.16.5-200.fc35.x86_64
, have made my system unable to detect my monitors native resolutions. The kernels prior to this, e.g. kernel-5.15.18-200.fc35.x86_6
, detect them just fine. This is what xrandr
displays when using kernel-5.15.18-200.fc35.x86_6
Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
DisplayPort-2 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 697mm x 392mm
2560x1440 164.96*+ 143.97 + 120.00 99.95 59.95
1920x1200 164.96
1920x1080 120.00 100.00 119.88 60.00 60.00 50.00 59.94
1600x1200 164.96
1680x1050 164.96
1280x1024 164.96
1440x900 164.96
1280x800 164.96
1280x720 60.00 50.00 59.94
1024x768 60.00
800x600 60.32
720x480 60.00 59.94
640x480 60.00 59.94
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
This is what xrandr
displays when using kernel-5.16.7-200.fc35.x86_64
or kernel-5.16.5-200.fc35.x86_64
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
DisplayPort-2 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 697mm x 392mm
1920x1080 60.00 60.00* 50.00 59.94
1280x720 60.00 50.00 59.94
1024x768 60.00
800x600 60.32
720x480 60.00 59.94
640x480 60.00 59.94
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
I’ve tried to use my saved profile in autorandr
but it fails with:
Failed to apply profile 'blindcant@1440p' (line 930):
Command failed: xrandr --fb 2560x1440 --output DisplayPort-2 --crtc 0 --gamma 1.0:1.0:1.0 --mode 2560x1440 --pos 0x0 --primary --rate 164.96 --reflect normal --rotate normal --set max bpc 8 --set non-desktop 0 --set scaling mode None --set TearFree auto --set underscan off --set underscan hborder 0 --set underscan vborder 0 (line 930)
And this is the profile that works fine when all kernels prior to 5.16.*.
This is my first AMD GPU and I have no X11 configuration for it like I’ve had for NVIDIA GPUs in the past. Currently I am booting into kernel-5.15.18-200.fc35.x86_6
so I can use the correct resolution but I would like to find a solution so I don’t have to stick with this kernel. What can I do to try and troubleshoot this issue?
Thanks.