Fix for 4k60 with a rx 580

User Support Hardware Issues
1

I’m running Qubes on a desktop with an rx 580 gpu. It worked fine except for two issues:

  • gui was very laggy
  • only 3840x2160@30Hz would work not 60Hz

I couldn’t select any refresh rate higher than 30Hz in the XFCE display settings or with xrandr.

The first thing I tried was installing kernel-latest:

$ sudo qubes-dom0-update kernel-latest

The 5.18.16-1 kernel worked just fine but didn’t resolve the issue.

Then I noticed this in Xorg.0.log:

(EE) Failed to load module “amdgpu” (module does not exist, 0)

Based on this thread I installed xorg-x11-drv-amdgpu and rebooted.

That removed the error from Xorg.0.log but then I had to manually add a mode and activate it to get 4k60 working:

$ cvt 3840 2160 60
# 3840x2160 59.98 Hz (CVT 8.29M9) hsync: 134.18 kHz; pclk: 712.75 MHz
Modeline "3840x2160_60.00"  712.75  3840 4160 4576 5312  2160 2163 2168 2237 -hsync +vsync

$ xrandr --newmode "3840x2160_60.00"  712.75  3840 4160 4576 5312  2160 2163 2168 2237 -hsync +vsync

$ xrandr --addmode HDMI-A-1 "3840x2160_60.00"

$ xrandr --output HDMI-A-1 --mode 3840x2160_60.00

That’s it! 4k60 works great. Now I just need to figure out how to add and activate the mode automatically next on each boot.

3 Likes
2

Nice.

I can’t get 4K/60Hz on one of my two monitors, Sony and LG. The LG works but not the Sony. Tested using the same cable. I get 40/60p on the Sony with a cable box and streaming stick so I know it supports it.

No failed messages in Xorg.0.log.But if I followed your steps, I get the error, xrandr: Configure crtc 0 failed.

What’s interesting is the latest kernel immediately lowered my stable CPU temp 2deg C.

Edit: It seems the monitor/tv had an Enhanced HDMI setting within the Watching TV menu instead of the Picture Settings menu. That activated 60Hz. Not intuitive.

3

Hey, you are running 4.1 right?
Asking because the xorg-x11-drv-amdgpu package doesn’t exist when trying to install with dnf.

nvm found my error
sudo qubes-dom0-update xorg-x11-drv-amdgpu

4

did you find a way to make it persistent?

5

One way would be with a desktop file. This is all in dom0

First create an executable script with the xrandr commands in it. I create it at ~/fix_video.bash:

#!/bin/bash
xrandr --newmode "3840x2160_60.00"  712.75  3840 4160 4576 5312  2160 2163 2168 2237 -hsync +vsync

xrandr --addmode HDMI-A-1 "3840x2160_60.00"

xrandr --output HDMI-A-1 --mode 3840x2160_60.00

And make it executable and create an autostart directory

$ chmod +x fix_video.bash
$ mkdir -p ~/.config/autostart/

Finally put this in ~/.config/autostart/fix_video.desktop:

[Desktop Entry]
Encoding=UTF-8
Version=1.0
Type=Application
Terminal=False
Exec=/home/dmm/fix_video.bash
Name=Fix 4k60 video

Be sure to change the Exec to where you put your script. That’s it! It should run shortly after you login to xfce.

1 Like