Hi Rebecca, On 28 January 2014 13:17, Rebecca N. Palmer <[email protected]> wrote:
> I have now tested a normal OpenSceneGraph build (i.e. cmake $source_dir > -DCMAKE_BUILD_TYPE=Release; make; sudo make install), and found that it > also has the osgviewerQt crash on my system, so this isn't a packaging bug; > given that similar issues have been reported in Qt before, I agree it may > not be an OSG bug either, and have noted that in the Ubuntu bug tracker ( > https://bugs.launchpad.net/ubuntu/+source/openscenegraph/+bug/1198806). A default build of the OSG won't build the examples, so won't build osgviewerQt. Did you enable the build of the examples? As a general note, in general I wouldn't expect a multi-threading crash to be directly packaging related, unless there is an issue with the threading problem being sensitive to dependencies or compiler options. If there is a bug on the OSG it'll be in osgQt's setup of Qt, or specifically missing something that makes Qt properly handling the checking of events for multiple contexts, multi-threaded. The way I avoided similar threading issues with osgViewer::GraphicsWindowX11 is to make sure that events and rendering are done with a separate X11 Display handle allowing one to get the events from the main thread without affecting the rendering that is happening in another thread. I suspect Qt isn't doing stuff like this, or doing it wrong. Robert.
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