[Bug 103802] New: [IVB] Linux 4.13 regression: ES2-CTS.functional.fragment_ops.blend failure

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103802

            Bug ID: 103802
           Summary: [IVB] Linux 4.13 regression:
                    ES2-CTS.functional.fragment_ops.blend failure
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: clayton.a.craft at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

A number of test failures have been observed when running
ES2-CTS.functional.fragment_ops.blend.* tests on IVB with the 4.13 kernel.
Setting INTEL_DEBUG=reemit (again, on 4.13) causes these tests to pass
consistently.

In order to reproduce this, we had to loop these tests and run multiple loops
at the same time on the system. It took a handful of iterations for the failure
to happen.

These failures do not occur when the kernel version is rolled back to 4.9. No
other hardware platforms were tested.

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