[Bug 62012] New: Intermittent black geometry

[Bug 62012] New: Intermittent black geometry

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=62012

          Priority: medium
            Bug ID: 62012
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Intermittent black geometry
          Severity: major
    Classification: Unclassified
                OS: All
          Reporter: michel@daenzer.net
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/Gallium/radeonsi
           Product: Mesa

Some apps intermittently show black instead of the expected coloration for some
parts of the geometry.

Investigating this with the rss-glx hack atunnel, the depth buffer appears to
have the correct values for the affected areas. So apparently the pixel shader
either doesn't run or fails to produce the correct colour values there for some
reason.

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[Bug 62012] Intermittent black geometry

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https://bugs.freedesktop.org/show_bug.cgi?id=62012

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
commit c446baa0be1ed2a3bf157519f89a65d348aad17c
Author: Michel Danzer <michel.daenzer@amd.com>
Date:   Fri Mar 22 14:09:10 2013 +0000

    R600: Use legacy (0 * anything = 0) MUL instructions for pow intrinsics

    Fixes wrong lighting in some corner cases with r600g and radeonsi, e.g.
    manifested by failure of two piglit/glean tests and intermittent black
    patches in many apps.

    Tested on SI and RS880.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=62012 [radeonsi]
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=58150 [r600g]

    NOTE: This is a candidate for the Mesa stable branch.

    Reviewed-by: Christian König <christian.koenig@amd.com>

    git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177730
91177308-0d34-0410-b5e6-96231b3b80d8

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