[Bug 107701] Asus X570ZD amdgpu display flicker at brightness level 1

[Bug 107701] Asus X570ZD amdgpu display flicker at brightness level 1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=107701

            Bug ID: 107701
           Summary: Asus X570ZD amdgpu display flicker at brightness level
                    1
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: dan@reactivated.net

On the Asus X570VD laptop with AMD Ryzen 7 with Radeon Vega Mobile Gfx, if you
use the brightness keys to reduce the screen brightness to the minimum level
under GNOME, the display flickers disturbingly.

This is reproducible under Ubuntu 18.04 with all updates applied (Linux 4.15).
It's also reproducible with AMDGPU-PRO All-Open drivers installed on top.
It's also reproducible under Linux 4.18.5.

It's hard to capture on camera, but you can get some appreciation of the issue
in this video:
https://youtu.be/tCoA45TJlAk

When the screen is in this state, the /sys/class/backlight/brightness file has
value 1. If I manually adjust to value 2, the flicker goes away.

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[Bug 107701] Asus X570ZD amdgpu display flicker at brightness level 1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=107701

--- Comment #1 from Daniel Drake <dan@reactivated.net> ---
Created attachment 141305
  --> https://bugs.freedesktop.org/attachment.cgi?id=141305&action=edit
Asus X570ZD dmesg with debug params

Typo above - product name is Asus X570ZD.
Here is the dmesg log

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[Bug 107701] Asus X570ZD amdgpu display flicker at brightness level 1

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https://bugs.freedesktop.org/show_bug.cgi?id=107701

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

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

--- Comment #2 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/497.

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