[Bug 77227] New: [BDW]Piglit some spec_OpenGL_1.1_depthstencil-default_fb* cases fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77227

          Priority: medium
            Bug ID: 77227
          Assignee: idr at freedesktop.org
           Summary: [BDW]Piglit some
                    spec_OpenGL_1.1_depthstencil-default_fb* cases fail
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: Drivers/DRI/i965
           Product: Mesa

System Environment:
--------------------------
Platform: Broadwell
Libdrm:       
(master)libdrm-2.4.52-10-g1cb5fc706cf5913d9dee33c939f65a23ecea17a5
Mesa:        (master)159cec9dec2320d821d388c0df8140c7705b6e0b
Xserver:   
(master)xorg-server-1.15.99.901-204-g901fbfbbbd71c0d82080957f8ba09eebbc786f2b
Xf86_video_intel:(master)2.99.911-44-g3310ee89c1f1a663de5f5b12b8125809a213996f
Cairo:        (master)bb17403622e9ea474017e0039af8ee48b2b285db
Libva:        (staging)960352aaf1e11891a533ce2c98b16edde24d6851
Libva_intel_driver:(staging)150f67c67bd92cd201b75a92388fe3a63b00cd8a
Kernel:    (drm-intel-nightly) 7cd8b823493acc320c7db9112de9d4e21c6dbd11

Bug detailed description:
-----------------------------
Following cases fail on Broadwell with Mesa master branch, but work well on
Haswell.
spec_OpenGL_1.1_depthstencil-default_fb-blit_samples=2
spec_OpenGL_1.1_depthstencil-default_fb-blit_samples=4
spec_OpenGL_1.1_depthstencil-default_fb-blit_samples=6
spec_OpenGL_1.1_depthstencil-default_fb-blit_samples=8
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-24_8_samples=2
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-24_8_samples=4
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-24_8_samples=6
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-24_8_samples=8
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-32F_24_8_REV_samples=2
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-32F_24_8_REV_samples=4
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-32F_24_8_REV_samples=6
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-32F_24_8_REV_samples=8
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-FLOAT-and-USHORT_samples=2
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-FLOAT-and-USHORT_samples=4
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-FLOAT-and-USHORT_samples=6
spec_OpenGL_1.1_depthstencil-default_fb-readpixels-FLOAT-and-USHORT_samples=8

run ./bin/fbo-depthstencil blit default_fb -samples=2 -auto
output:
Testing default_fb.
Testing glBlitFramebuffer(depthstencil).
Depth at 0,0   Expected: 0.250000   Observed: 0.500000
Stencil at 0,0   Expected: 0x33   Observed: 0x00
Depth at 1,0   Expected: 0.250000   Observed: 0.500000
Stencil at 1,0   Expected: 0x33   Observed: 0x00
Depth at 2,0   Expected: 0.250000   Observed: 0.500000
Stencil at 2,0   Expected: 0x33   Observed: 0x00
Depth at 3,0   Expected: 0.250000   Observed: 0.500000
Stencil at 3,0   Expected: 0x33   Observed: 0x00
Depth at 4,0   Expected: 0.250000   Observed: 0.500000
Stencil at 4,0   Expected: 0x33   Observed: 0x00
Depth at 5,0   Expected: 0.250000   Observed: 0.500000
Stencil at 5,0   Expected: 0x33   Observed: 0x00
Depth at 6,0   Expected: 0.250000   Observed: 0.500000
Stencil at 6,0   Expected: 0x33   Observed: 0x00
Depth at 7,0   Expected: 0.250000   Observed: 0.500000
Stencil at 7,0   Expected: 0x33   Observed: 0x00
Depth at 8,0   Expected: 0.250000   Observed: 0.500000
Stencil at 8,0   Expected: 0x33   Observed: 0x00
Depth at 9,0   Expected: 0.250000   Observed: 0.500000
...
Total failures: 29768
PIGLIT: {'result': 'fail' }

Reproduce steps:
----------------------------
1. xinit
2. ./bin/fbo-depthstencil blit default_fb -samples=2 -auto

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