#0  0x00007fc7ce1d0c9c in cwGetBackingPicture ()
   from /usr/lib/xorg/modules//libxaa.so
No symbol table info available.
#1  0x00007fc7ce1d0e96 in cwComposite () from /usr/lib/xorg/modules//libxaa.so
No symbol table info available.
#2  0x0000000000527ea2 in ?? ()
No symbol table info available.
#3  0x0000000000515c3f in ?? ()
No symbol table info available.
#4  0x000000000044eaaf in ?? ()
No symbol table info available.
#5  0x0000000000436b9d in ?? ()
No symbol table info available.