[Bug 111756] WebGL2 conformance test failed when enabling Iris on Coffee Lake

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111756

            Bug ID: 111756
           Summary: WebGL2 conformance test failed when enabling Iris on
                    Coffee Lake
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: not set
          Priority: not set
         Component: Drivers/Gallium/Iris
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: lin.sun at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 145451
  --> https://bugs.freedesktop.org/attachment.cgi?id=145451&action=edit
Failed test case

Steps:
1. Fetch latest master branch (88b8922f57137e75c8ea48969e27a8275adbdf5a) of
Mesa source code.
2. Build Mesa with following options:
meson out -Dplatforms=x11,drm \
          -Ddri-drivers=i915,i965 -Dvulkan-drivers=intel -Dgallium-drivers=iris
\
          -Dgles1=true -Dgles2=true -Dshared-glapi=true -Dgbm=true -Ddri3=true
3. Set environments:
  3.1 Add Mesa library path to LD_LIBRARY_PATH
  3.2 Add Mesa dri path to LIBGL_DRIVERS_PATH
  3.3 Set MESA_LOADER_DRIVER_OVERRIDE=iris
4. Launch Chrome, open the test page
(conformance2/renderbuffers/invalidate-framebuffer.html) in the attachment

Expected Result:
The test case passed.

Actual Result:
Test test case failed.

Note:
This test case passed if MESA_LOADER_DRIVER_OVERRIDE=iris is not set while all
other steps is the same.

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