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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Setting gamma or color temperature on GK104 causes horizontal artifacts / flickering"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111841">111841</a>
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<th>Summary</th>
<td>Setting gamma or color temperature on GK104 causes horizontal artifacts / flickering
</td>
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<th>Product</th>
<td>xorg
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>not set
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<th>Component</th>
<td>Driver/nouveau
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
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<th>Reporter</th>
<td>brianclinkenbeard@protonmail.com
</td>
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=145545" name="attach_145545" title="dmesg log">attachment 145545</a> <a href="attachment.cgi?id=145545&action=edit" title="dmesg log">[details]</a></span>
dmesg log
After setting the gamma or color temperature through various methods (redshift
-m randr, redshift -m drm, GNOME night shift on xorg or wayland) horizontal
artifacts begin to flicker. This does not severely obscure the screen but
appears as small lines horizontal lines flickering quickly. This notably does
not happen using the "vidmode" method of redshift
(<a href="https://github.com/jonls/redshift/blob/master/src/gamma-vidmode.c">https://github.com/jonls/redshift/blob/master/src/gamma-vidmode.c</a>). I've
tested this on multiple displays.
The effect is more noticeable on darker backgrounds.
Steps to reproduce:
1) Use GK104/NVE0 on Xorg or Wayland.
2) Try to adjust color temperature or gamma with software such as redshift (-m
randr or drm).
I've attached the dmesg log, note that I am not certain the gnome-shell
segfaults have anything to do with this issue.
Kernel:
Linux desktop 5.2.0-2-amd64 #1 SMP Debian 5.2.9-2 (2019-08-21) x86_64 GNU/Linux
Card:
NVIDIA Corporation GK104 [GeForce GTX 770]</pre>
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