[Bug 111841] New: Setting gamma or color temperature on GK104 causes horizontal artifacts / flickering - bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 111841] New: Setting gamma or color temperature on GK104 causes horizontal artifacts / flickering
Date: Fri, 27 Sep 2019 09:07:09 +0000	[thread overview]
Message-ID: <bug-111841-8800@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=111841

            Bug ID: 111841
           Summary: Setting gamma or color temperature on GK104 causes
                    horizontal artifacts / flickering
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: not set
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: brianclinkenbeard-g/b1ySJe57IN+BqQ9rBEUg@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Created attachment 145545
  --> https://bugs.freedesktop.org/attachment.cgi?id=145545&action=edit
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
(https://github.com/jonls/redshift/blob/master/src/gamma-vidmode.c). 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]

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