For what it's worth, Tao Presentations (Google Taodyne, can't post URLs yet) also has the same problem on Linux, and the same workaround with __GL_SYNC_TO_VBLANK also works. Special thanks to Bastian for that workaround.
Tao Presentations is also based on OpenGL and Qt. For some reason, we tend to see the issue a lot more often with contents that causes heavy multithreading (e.g. when we have video streams playing in the presentation). On the other hand, it looks like the problem goes away when using apitrace. So Alberto's suggestion would not work at least in our case. I wonder if all other Qt/OpenGL applications are impacted? If not, this might help us narrow the issue down and figure out whether's it's a driver bug, or whether there's something to fix either in Qt or in OSG and Tao? Cheers, Christophe ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=54012#54012 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
