Hi,
On 26/05/11 12:44, J.P. Delport wrote:
Hi,
On 26/05/11 11:32, Robert Osfield wrote:
Hi J.P,
On Thu, May 26, 2011 at 10:22 AM, J.P. Delport<[email protected]>
wrote:
osgviewer --window 0 0 800 600 cow.osg
Error: In Texture::Extensions::setupGLExtensions(..) OpenGL version
test failed, requires valid graphics context.
Scaling image 'Images/reflect.rgb' from (128,128) to (0,0)
Segmentation fault
A curious error - GraphicsWindowX11 shouldn't create a window without
a context and I would expect the makeCurrent on the context to fail
and be reported, what shouldn't happen is that the code to get to
doing the draw traversal without a context being current.
Could you try running single threaded via:
osgviewer --window 0 0 800 600 cow.osg --SingleThreaded
To see if that makes any difference.
I have not been able to get --SingleThreaded to misbehave yet.
Without --SingleThreaded I get one of:
* Working window
* Segfault e.g. [1]
* X error e.g. [2]
* Hang on start (black GL window) [3]
Does look like a timing issue at startup.
It takes a bit more effort to reproduce on a faster machine it seems.
The crashes are more frequent than successful starts on my laptop:
Centrino Duo, NVidia GeForce Go 7300
On a new quad core intel with GTS240 I can get it to die less often,
about once or twice in 100 starts. Debian Sid 32-bit, Xorg 7.6, NVidia
drivers 270.41.19.
ulimit -c unlimited
for ((i=0; i<100; i++)) do osgviewer --window 0 100 800 600 cow.osg &
osgviewer --window 500 0 800 600 cow.osg & sleep 0.5; killall osgviewer;
done
Sometimes I get the weird:
Error: In Texture::Extensions::setupGLExtensions(..) OpenGL version test
failed, requires valid graphics context.
Otherwise just a segfault.
jp
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