[Bug 94127] [HSW] textureGather + samplerCube sometimes fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94127

            Bug ID: 94127
           Summary: [HSW] textureGather + samplerCube sometimes fail
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: imirkin at alum.mit.edu
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 121724
  --> https://bugs.freedesktop.org/attachment.cgi?id=121724&action=edit
deqp test failure pattern

I'm seeing the following failure pattern on *texture* dEQP tests. Only cube
fails, and not 100% of them. All of these tests pass on nouveau/GK208, so it's
not some really dumb texture completeness issue.

It does seem like the only tests that pass are in the filter_mode subgroup (and
all of those do seem to pass). So probably something with texture setup?

Amusingly that test case group is

TestCaseGroup(m_context, "filter_mode", "Test that filter modes have no
effect");

oops :) I guess it has the effect of causing the tests to pass. By default,
nearest/nearest is used for min/mag filters.

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