[Bug 112148] Broken colors on RX 5700 with adjusted brightness

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112148

            Bug ID: 112148
           Summary: Broken colors on RX 5700 with adjusted brightness
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: not set
          Priority: not set
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: mlichvar at redhat.com

I have an RX 5700 card connected to a monitor which doesn't display dark colors
very well. The brightness needs to be adjusted in software. I use the xcalib
tool like this:

xcalib -c
xcalib -a -b 10 -co 90

This displays dark colors well, but some images/videos have weird artifacts.
After playing with a color picker it looks like colors that have the green
component zero are much brighter than they should be. For example, color
#750000 is much brighter than #750100. I'll attach some images that show the
problem.

When the monitor is connected to a different computer (with a non-AMD GPU)
configured with the same xcalib commands, the problem disappears, so it seems
to be specific to the hardware/driver.

Please let me know if you need more information.

Installed packages:
kernel-5.3.6-300.fc31.x86_64
xorg-x11-server-Xorg-1.20.5-7.fc31.x86_64
xorg-x11-drv-amdgpu-19.1.0-1.fc31.x86_64
mesa-dri-drivers-19.2.0-1.fc31.x86_64
xcalib-0.8-24.fc31.x86_64

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20191028/cfb250ac/attachment.html>