[Bug 84788] New: [BSW]Piglit spec_EXT_transform_feedback_geometry-shaders-basic fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84788

            Bug ID: 84788
           Summary: [BSW]Piglit
                    spec_EXT_transform_feedback_geometry-shaders-basic
                    fails
           Product: Mesa
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

System Environment:
--------------------------
Platform: BSW
Libdrm:    (master)libdrm-2.4.58-4-g00847fa48b83a85b0cb882594a12ed1511f780db
Mesa:    (master)16b53005a7df4249fecb6641af0934c32181fdea
Xserver:(master)xorg-server-1.16.0-386-g95a5b92e37f73f497d547fd91c543c16d2cc73de
Xf86_video_intel:(master)2.99.916-84-gec2b9ac81aed0d2dda2948171ca1c260184bf221
Libva:        (master)cdf8636d5fc5b1558570fede347e1599e0d6af3d
Libva_intel_driver:(master)f11176415ec26eb5960ba6841d2d9c22f2cabc60
Kernel:   (drm-intel-nightly)eabc0c8db15f9ba4d727aee5e0612a68cafe1ab5

Bug detailed description:
---------------------------
It fails on BSW with mesa master branch, works well on BDW.
Following cases also fail:
spec_EXT_transform_feedback_intervening-read_output_use_gs
spec_EXT_transform_feedback_intervening-read_prims_generated_use_gs
spec_EXT_transform_feedback_intervening-read_prims_written_use_gs
spec_EXT_transform_feedback_overflow-edge-cases_use_gs

output:
Incorrect data for vertex 1.  Expected 1, got 0.Incorrect data for vertex 2. 
Expected 2, got 0.Incorrect data for vertex 3.  Expected 3, got 0.Incorrect
data for vertex 4.  Expected 4, got 0.Incorrect data for vertex 5.  Expected 5,
got 0.Incorrect data for vertex 6.  Expected 6, got 0.Incorrect data for vertex
7.  Expected 7, got 0.Incorrect data for vertex 8.  Expected 8, got 0.Incorrect
data for vertex 9.  Expected 9, got 0.PIGLIT: {"result": "fail" }

Reproduce steps:
-------------------------
1. xinit
2. bin/ext_transform_feedback-geometry-shaders-basic -fbo -auto

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