Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
296 frames in 5.0 seconds = 59.198 FPS
298 frames in 5.0 seconds = 59.417 FPS
301 frames in 5.0 seconds = 60.007 FPS
300 frames in 5.0 seconds = 59.997 FPS
296 frames in 5.0 seconds = 59.009 FPS
299 frames in 5.0 seconds = 59.609 FPS
301 frames in 5.0 seconds = 60.006 FPS
301 frames in 5.0 seconds = 60.004 FPS
301 frames in 5.0 seconds = 60.006 FPS
301 frames in 5.0 seconds = 60.004 FPS
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0"
      after 9578 requests (9578 known processed) with 0 events remaining.