Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
291 frames in 5.0 seconds = 58.076 FPS
288 frames in 5.0 seconds = 57.430 FPS
289 frames in 5.0 seconds = 57.629 FPS
301 frames in 5.0 seconds = 60.023 FPS
301 frames in 5.0 seconds = 60.023 FPS
301 frames in 5.0 seconds = 60.023 FPS
293 frames in 5.1 seconds = 57.650 FPS
301 frames in 5.0 seconds = 60.031 FPS
301 frames in 5.0 seconds = 60.022 FPS
301 frames in 5.0 seconds = 60.023 FPS
301 frames in 5.0 seconds = 60.022 FPS
301 frames in 5.0 seconds = 60.025 FPS
301 frames in 5.0 seconds = 60.009 FPS
289 frames in 5.0 seconds = 57.630 FPS
301 frames in 5.0 seconds = 60.020 FPS
301 frames in 5.0 seconds = 60.022 FPS
301 frames in 5.0 seconds = 60.022 FPS
301 frames in 5.0 seconds = 60.022 FPS
301 frames in 5.0 seconds = 60.023 FPS
289 frames in 5.0 seconds = 57.629 FPS
277 frames in 5.0 seconds = 55.237 FPS
277 frames in 5.0 seconds = 55.235 FPS
276 frames in 5.0 seconds = 55.037 FPS
301 frames in 5.0 seconds = 60.021 FPS
301 frames in 5.0 seconds = 60.023 FPS
301 frames in 5.0 seconds = 60.022 FPS
301 frames in 5.0 seconds = 60.021 FPS
277 frames in 5.0 seconds = 55.237 FPS
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
      after 17052 requests (17052 known processed) with 0 events remaining.