[Bug 108941] Enabling PP_OVERDRIVE_MASK with dual monitors causes artifacting

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108941

            Bug ID: 108941
           Summary: Enabling PP_OVERDRIVE_MASK with dual monitors causes
                    artifacting
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: boukehaarsma23 at gmail.com

Steps to reproduce:

1) Have dual monitors
2) Enable PP_OVERDRIVE_MASK by flipping the appropriate bit in
amdgpu.ppfeaturemask. (For my configuration I used: 0xfffd7fff)
3) See artifacting.

When using default featuremask, or when using a single monitor with the
overdrive bit enabled behaves correctly. I heard multiple people who have the
same issue, so it does not seem related to my setup.

Setup:
RX480
Linux 4.20-rc5


If additional information is needed please let me know.

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