#0  on_screen_changed (scr=0x0, data=0x8079b00) at xrandr-capplet.c:127
  [Error: xrandr-capplet.c was not found in source tree]
#1  0x0804f1ae in run_application (app=0x8079b00) at xrandr-capplet.c:1755
  [Error: xrandr-capplet.c was not found in source tree]
#2  0x0804f83c in main (argc=1, argv=0xbf946f34) at xrandr-capplet.c:1799
  [Error: xrandr-capplet.c was not found in source tree]