<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - libswrAVX2.so Causes hang with QOpenGLWidget" href="https://bugs.freedesktop.org/show_bug.cgi?id=100262#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - libswrAVX2.so Causes hang with QOpenGLWidget" href="https://bugs.freedesktop.org/show_bug.cgi?id=100262">bug 100262</a> from <a class="email" href="mailto:chris@circlecvi.com" title="chris@circlecvi.com">chris@circlecvi.com</a> <pre>(In reply to Tim Rowley from <a href="show_bug.cgi?id=100262#c1">comment #1</a>) > Not seeing a hang here, but a transparent area where the OpenGL should be > rendered to. > > what version of Mesa and Qt were you using? > > If you don't mind running an experiment, could you try setting > KNOB_MAX_WORKER_THREADS=4 in the environment before running hellogl2? This > will stop swr from binding threads which might possibly be confusing Qt's > internal threading. Hi Tim! I tested on Qt 4.8.6 and 5.6.1, both cause a hang for me using the SWR driver on Mesa 13.0.1 and 13.0.5 Setting the MAX_KNOB_WORKER_THREADS=4 seems to correct the issue! Can you tell me if this is a permanent fix? Also does this need to change with the number of CPUs available? I have field deployments experiencing these issues. Thanks!</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>