[Bug 82759] New: dota2 and steam rendering errors

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82759

          Priority: medium
            Bug ID: 82759
          Assignee: idr at freedesktop.org
           Summary: dota2 and steam rendering errors
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: All
          Reporter: lemody at gmail.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/DRI/i965
           Product: Mesa

Steam UI and Dota2 loading screen have black tiles in them, attached screenshot
tells more than words.

Tested this on HSW machine, 64bit Ubuntu 14.04 and 32bit Mesa (dota2 is 32bit)

Bisected to following commit:
--- 8< ---
commit 2f28a0dc23165123cf1e8b5942acad37878edd8a
Author: Kristian Høgsberg <krh at bitplanet.net>
Date:   Mon Jul 7 16:44:58 2014 -0700

    i965: Implement fast color clears using meta operations

    This patch uses the infrastructure put in place by previous patches
    to implement fast color clears and replicated color clears in terms of
    meta operations.

    This works all the way back to gen7 where fast clear was introduced and
    adds support for fast clear on gen8.  It replaces the blorp path
    completely and improves on a few cases.  Layered clears are now done
    using instanced rendering and multiple render-target clears use a
    MRT shader with rep16 writes.

    Signed-off-by: Kristian Høgsberg <krh at bitplanet.net>
    Acked-by: Kenneth Graunke <kenneth at whitecape.org>

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