[Bug 93676] Bad blit from FBO to FRONT with Intel HD6000 Mesa 11.2.0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93676

            Bug ID: 93676
           Summary: Bad blit from FBO to FRONT with Intel HD6000 Mesa
                    11.2.0
           Product: Mesa
           Version: 11.0
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: CliveMcCarthy at gmail.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 120976
  --> https://bugs.freedesktop.org/attachment.cgi?id=120976&action=edit
No artefacts when rendering FRONT and BACK

There are bad artefacts when rendering via an FBO to FRONT with a blit. These
are absent when rendering to both FRONT_AND_BACK buffers with a buffer swap.

Environment:
   Linux Mint 17 (Linux 3.13.0-24-generic)
   Mesa 11.2.0 (via oibaf)
   HD6000 GPU

Attached are two executables one with FBO rendering one without. The Mesa Intel
linker takes two minutes to link so be patient.

The very same executables work just fine with an Nvida GPU.

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