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["Johannes H. Jensen" <joh@xxxxxxxxxxxxxxxxx>]

I also experience the same freezes on my Thinkpad X61 with Intel GM965.
However I'm unable to run it in software mode as described above by
setting LIBGL_DRIVERS_PATH=/notapath

$ ./webots
An invalid memory reference occured.
Please report this error to http://www.cyberbotics.com/bug/
This will help us improving this software. Thank you.

Quitting...


This happens whenever I open any of the demo world files... If I select "Your Project" from the startup menu it seems to work - the 3D world appears and I'm able to manipulate it with my mouse.


Launching webots-bin with gdb gives the following backtrace:

(gdb) run
Starting program: /home/joh/Packages/webots-64/webots-bin 
[Thread debugging using libthread_db enabled]
[New Thread 0x7fffeb235910 (LWP 11610)]
[New Thread 0x7fffe8a74910 (LWP 11619)]

Program received signal SIGSEGV, Segmentation fault.
0x00007fffea2716be in ?? () from lib/RenderSystem_GL.so
(gdb) bt
#0  0x00007fffea2716be in ?? () from lib/RenderSystem_GL.so
#1  0x00007fffea2754eb in ?? () from lib/RenderSystem_GL.so
#2  0x00007fffea2714d7 in ?? () from lib/RenderSystem_GL.so
#3  0x00007fffea27192c in ?? () from lib/RenderSystem_GL.so
#4  0x00007fffea26b360 in ?? () from lib/RenderSystem_GL.so
#5  0x00007fffea2619d1 in ?? () from lib/RenderSystem_GL.so
#6  0x00007fffea26280d in ?? () from lib/RenderSystem_GL.so
#7  0x00007ffff484e399 in Ogre::Texture::createInternalResources() ()
   from /home/joh/Packages/webots-64/lib/libOgreMain-1.6.5.so
#8  0x00007ffff4851922 in Ogre::TextureManager::createManual(std::string const&, std::string const&, Ogre::TextureType, unsigned int, unsigned int, unsigned int, int, Ogre::PixelFormat, int, Ogre::ManualResourceLoader*, bool, unsigned int) ()
   from /home/joh/Packages/webots-64/lib/libOgreMain-1.6.5.so
#9  0x00000000006ca9e9 in OgreCamera::init(char const*, void*, char, int, int, int, double, double, double, double, bool) ()
#10 0x00000000006f1649 in V_Camera::initOgreCamera() ()
#11 0x00000000006f29cb in V_Camera::computeValue() ()
#12 0x0000000000730499 in V_SimpleSensor::needToWriteAnswer() ()
#13 0x00000000006eee32 in V_Camera::writeAnswer(C_Controller*) ()
#14 0x0000000000722e39 in V_Robot::dispatchAnswer() ()
#15 0x00000000006a3648 in C_Controller::step(C_Request*) ()
#16 0x00000000006aef9d in C_Scheduler::step() ()
#17 0x00000000005dca17 in A_Application::runSimulation() ()
#18 0x00000000005dcf82 in A_Application::MainLoop() ()
#19 0x0000000000a17c90 in wxEntry(int&, wchar_t**) ()
#20 0x00000000005d381b in main ()


Any idea why it crashes here? Software mode is an okay workaround for me, if it didn't crash :-P

-- 
[i965] 64 bit Webots simulator freezes system with Intel GM965
https://bugs.launchpad.net/bugs/513523
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