[Bug 96671] Latest INTEL LINUX Mesa driver installer (1.4.0) causes MATLAB graphics operations to either hang or produce a java exception on Fedora 23

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96671

            Bug ID: 96671
           Summary: Latest INTEL LINUX Mesa driver installer (1.4.0)
                    causes MATLAB graphics operations to either hang or
                    produce a java exception on Fedora 23
           Product: Mesa
           Version: 11.1
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: rick.irons at mathworks.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

The latest INTEL LINUX Mesa driver installer
(https://01.org/linuxgraphics/downloads/intel-graphics-installer-linux-1.4.0)
causes MATLAB graphics operations to either hang or produce a java exception on
Fedora 23.  Commands such as 'surface' and 'penny' will hang when run.  The
command 'opengl info' will cause a java exception when run.  The issue can be
avoided by setting the environment variable LIBGL_DRI3_DISABLE to 'true' prior
to starting MATLAB (Why this works is not understood and an explanation
regarding why this avoids the issue and if it is a valid workaround would be
appreciated).  

The 3.0 Mesa 11.0.3 Intel Open Source Technology Center driver that comes with
Fedora 23 does not encounter the issue.  I was able to recreate the issue on a
Lenovo T450s ThinkPad with Intel HD Graphics 5500.

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