[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94246

            Bug ID: 94246
           Summary: Text shadow is rendered incorrectly on Radeon R7 260X
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: smikkelsendk at gmail.com

Created attachment 121882
  --> https://bugs.freedesktop.org/attachment.cgi?id=121882&action=edit
Log from Xorg with default options

I noticed some texts were looking blurry depending on my MATE Desktop theme and
filed a bug report to MATE team
(https://github.com/mate-desktop/mate-themes/issues/104). We discovered that
the problem is that my GFX card renders text shadows incorrectly.

Adding this option fixes the problem:
    Option "ShadowPrimary" "true"
This has a side effect of disabling pageflipping. However just disabling
pageflipping alone does not fix the problem.

Also if I turn off acceleration completely with:
        Option "Accel" "false"

The problem also is fixed.

Attached: Screenshot and XOrg log of when the problem appears (default options)
and when it is fixed (enabling ShadowPrimary)

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