[Bug 93054] [BDW] DiRT Showdown and Bioshock Infinite only render half the screen (bottom left triangle)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93054

            Bug ID: 93054
           Summary: [BDW] DiRT Showdown and Bioshock Infinite only render
                    half the screen (bottom left triangle)
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: kenneth at whitecape.org
          Reporter: kenneth at whitecape.org
        QA Contact: intel-3d-bugs at lists.freedesktop.org

DiRT Showdown and Bioshock Infinite both only render half of the screen - only
the lower left of the two triangles.   This happens right away, even at the
splash screen.

export MESA_GL_VERSION_OVERRIDE=4.1
export MESA_GLSL_VERSION_OVERRIDE=410

The scalar VS backend appears to be at fault, because INTEL_DEBUG=vec4 fixes
it.

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