[Bug 15195] New: [i915 i965] glean case depthStencil failed

[<bug...@fr...>]

http://bugs.freedesktop.org/show_bug.cgi?id=15195

           Summary: [i915 i965] glean case depthStencil failed
           Product: Mesa
           Version: unspecified
          Platform: Other
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i915
        AssignedTo: dri...@li...
        ReportedBy: shu...@in...


Created an attachment (id=15442)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=15442)
test case that can't reproduce the issue

System Environment:
--------------------------

--Platform: i965

--Architecture(32-bit,64-bit,compatiblity): all

--2D driver:
commit 645980596450ed21c3b8927410a6bfe38a0c55d1

--3D driver:
commit c98642169496cfa7d8026dbd5214fafbde962002

--Xserver:
commit 4217ba0cf0c9bbea3774760e836ab372acf3237c

--Drm
commit b0817a42e789a83454e6acba0578116829e2bf51

--Kernel:
2.6.23.1


Bug detailed description:
-------------------------
glean case depthStencil failed. This case seems is used to test
GL_EXT_PACKED_DEPTH_STENCIL extension.
I got this result on some machines like Q965, 945G, 945GM


depthStencilFAIL
        Image returned by glReadPixels didn't match the expected result
(0xbf82ae60 != 0x0)
depthStencilFAIL
        Image returned by glReadPixels didn't match the expected result
(0xbf82ae60 != 0x0)
depthStencil:  PASS rgba8, win+pmap, id 88
        glReadPixels GL_DEPTH_STENCIL rate: 0.00 MBytes per second.
        glReadPixels GL_DEPTH/GLuint rate: 0.00 MBytes per second.
        glReadPixels GL_DEPTH/GLushort rate: 0.00 MBytes per second.


But I failed to simply this issue as simple case. running the attached test
case(which mostly the same as glean case) can give me the correct result, but
not glean.


Reproduce steps:
----------------
1. start X
2. ./glean -r log -t depthStencil


Current result:
----------------
depthStencilFAIL
        Image returned by glReadPixels didn't match the expected result
(0xbf82ae60 != 0x0)
depthStencilFAIL
        Image returned by glReadPixels didn't match the expected result
(0xbf82ae60 != 0x0)
depthStencil:  PASS rgba8, win+pmap, id 88
        glReadPixels GL_DEPTH_STENCIL rate: 0.00 MBytes per second.
        glReadPixels GL_DEPTH/GLuint rate: 0.00 MBytes per second.
        glReadPixels GL_DEPTH/GLushort rate: 0.00 MBytes per second.



Expected result:
----------------
glean case depthStencil should pass


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