[Mesa-dev] [Bug 100262] libswrAVX2.so Causes hang with QOpenGLWidget

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100262

            Bug ID: 100262
           Summary: libswrAVX2.so Causes hang with QOpenGLWidget
           Product: Mesa
           Version: 13.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/swr
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: chris at circlecvi.com
        QA Contact: mesa-dev at lists.freedesktop.org

Created attachment 130297
  --> https://bugs.freedesktop.org/attachment.cgi?id=130297&action=edit
Minimal Qt Project sample widget showing issue

Following is some Qt example code straight from their repository that runs
properly using Gallium llvmpipe driver, and Gallium swr driver on AVX enabled
machines (libswrAVX.so).

Running the same demo on AVX2 enabled machines (libswrAVX2.so) causes the
machine to hang at 100% CPU usage and never recovers. The library detects AVX2,
however GL calls in the paintEvent appear to be hanging the machine (IE no GL
calls, no issue)


Please see attached for the QOpenGlWidget example (Qt v5)

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