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

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

[bugzilla-daemon]

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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@lists.freedesktop.org
          Reporter: mlichvar@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

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

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

--- Comment #1 from Miroslav Lichvar <mlichvar@redhat.com> ---
Created attachment 145833
  --> https://bugs.freedesktop.org/attachment.cgi?id=145833&action=edit
Red gradient

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

[bugzilla-daemon]

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

--- Comment #2 from Miroslav Lichvar <mlichvar@redhat.com> ---
Created attachment 145834
  --> https://bugs.freedesktop.org/attachment.cgi?id=145834&action=edit
Displayed red gradient

This is a photo of the monitor displaying the first attached image.

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

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

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #3 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/946.

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