(gdb) thread 1
[Switching to thread 1 (Thread 0x7f74211cc780 (LWP 5102))]
#0  0x00007f742054ad27 in ioctl () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt
#0  0x00007f742054ad27 in ioctl () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f741488790a in ?? () from /usr/lib/fglrx/dri/fglrx_dri.so
#2  0x00007f741487ecc1 in ?? () from /usr/lib/fglrx/dri/fglrx_dri.so
#3  0x00007f7413c4df77 in ?? () from /usr/lib/fglrx/dri/fglrx_dri.so
#4  0x00007f7413c4f2b6 in ?? () from /usr/lib/fglrx/dri/fglrx_dri.so
#5  0x00007f7413142c71 in ?? () from /usr/lib/fglrx/dri/fglrx_dri.so
#6  0x00007f7413c8905f in ?? () from /usr/lib/fglrx/dri/fglrx_dri.so
#7  0x00007f7415075c1f in glXSwapBuffers () from /usr/lib/fglrx/libGL.so.1
#8  0x00007f7415269497 in ?? () from /usr/lib/compiz/libopengl.so
#9  0x0000000000000005 in ?? ()
#10 0x0000000000000001 in ?? ()
#11 0x00007f741edb60a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f741edb649a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00000000004029ae in main ()
(gdb) thread 2
[Switching to thread 2 (Thread 0x7f741cd87700 (LWP 5105))]
#0  0x00007f7420546b03 in poll () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt
#0  0x00007f7420546b03 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f741edb6036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f741edb6164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f741edb61b1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f741edd79e5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f742024ae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007f74205524bd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()