[Bug 74700] New: Dota2 shimmering artifacts on Mesa 10.0.1 on Iris Pro graphics

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=74700

          Priority: medium
            Bug ID: 74700
          Assignee: idr at freedesktop.org
           Summary: Dota2 shimmering artifacts on Mesa 10.0.1 on Iris Pro
                    graphics
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: pgriffais at valvesoftware.com
          Hardware: Other
            Status: NEW
           Version: 10.0
         Component: Drivers/DRI/i965
           Product: Mesa

Created attachment 93638
  --> https://bugs.freedesktop.org/attachment.cgi?id=93638&action=edit
Screenshot of the corruption; this effect is supposed to be a subtle specular
reflection

We're seeing a problem where DOTA2 exhibits incorrect specular reflections when
ran on Intle graphics. To reproduce this issue, watching any ongoing game and
panning the camera over the Radiant side of the map seems to do it. What is
supposed to be subtle specular reflection on the ground and trees ends up
looking very noisy and shimmery.

This is very easy to reproduce out of the box on the Brix SteamOS machines.

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