[Bug 95144] [BDW] Incorrect rendering of Win8.1 VM working in VMware Workstation

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95144

Andrey Sudnik <andrey.sudnik at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #123317|0                           |1
        is obsolete|                            |

--- Comment #4 from Andrey Sudnik <andrey.sudnik at intel.com> ---
Created attachment 123939
  --> https://bugs.freedesktop.org/attachment.cgi?id=123939&action=edit
Trace file from HSW

Attached trace file captured on HSW.
It doesn't reproduce visual issues on HSW, but on BDW it reproduces visual
corruptions.
Please ignore previous trace file, Windows VM cashes rendered image and even on
HSW previous trace file reproduces the issue.

A good example is call #55306 glDrawArrays(GL_TRIANGLE_STRIP,0,4),
This call draws a background of the pdf document page. On HSW is draws white
rectangle however on BDW it draws only white triangle.

This draw call uses shader program #201 created in call #24247.
Most likely the issue not in the fragment shader. FS was modified to output
always vec4(1.0, 1.0, 1.0, 1.0), and the glDrawArrays draws white triangle on
BDW.
Most likely the issue is in vertex shader processing.

Haven't checked vertex data stored in buffers.

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