https://bugs.freedesktop.org/show_bug.cgi?id=104319

            Bug ID: 104319
           Summary: AMDGPU/DC: Internal display corrupted when mirroring
                    on external monitor on HDMI
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: carlo@caione.org

Created attachment 136245
  --> https://bugs.freedesktop.org/attachment.cgi?id=136245&action=edit
dc-mirroring-journal

Same machine as on the https://bugs.freedesktop.org/show_bug.cgi?id=104281 but
reproduced on multiple ACER laptops.

Using the latest Linus master compiled with CONFIG_DRM_AMD_DC_PRE_VEGA=y we
have that sometimes the image on the internal panel gets corrupted when
mirroring on an external HDMI display (see [0]).

We have verified that this is a regression introduced by the DC code. In
attachment the journal output.

[0] https://imgur.com/a/rnItJ

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