(gdb) thread 1 [Switching to thread 1 (Thread 0x7f7e8d6049c0 (LWP 2069))] #0 0x00007f7e8a866738 in __GI___poll (fds=0x7fff77b8ecf0, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:83 83 in ../sysdeps/unix/sysv/linux/poll.c (gdb) bt #0 0x00007f7e8a866738 in __GI___poll (fds=0x7fff77b8ecf0, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:83 #1 0x00007f7e80b19ddd in ?? () from /usr/lib/nvidia-current/libGL.so.1 #2 0x00007f7e7f881280 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.295.20 #3 0x00007f7e80ae47d4 in glXWaitVideoSyncSGI () from /usr/lib/nvidia-current/libGL.so.1 #4 0x00007f7e80db81a4 in PrivateGLScreen::waitForVideoSync() () from /usr/lib/compiz/libopengl.so #5 0x00007f7e80db8369 in PrivateGLScreen::paintOutputs(std::list >&, unsigned int, CompRegion const&) () from /usr/lib/compiz/libopengl.so #6 0x00007f7e80fd8f09 in CompositeScreen::paint(std::list >&, unsigned int) () from /usr/lib/compiz/libcomposite.so #7 0x00007f7e80fda77f in CompositeScreen::handlePaintTimeout() () from /usr/lib/compiz/libcomposite.so #8 0x0000000000424dbb in CompTimer::triggerCallback() () #9 0x0000000000424ef2 in CompTimeoutSource::callback() () #10 0x00000000004243ed in CompTimeoutSource::dispatch(sigc::slot_base*) () #11 0x00007f7e8be399df in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) () from /usr/lib/libglibmm-2.4.so.1 #12 0x00007f7e8b93fa5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #13 0x00007f7e8b940258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #14 0x00007f7e8b940792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #15 0x000000000042e8b6 in CompScreen::eventLoop() () #16 0x000000000042227a in main ()