--------- SITUATION (1) --------- z411@kureha:~$ xrandr Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384 DVI-I-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 290mm 1920x1080 60.00*+ 1680x1050 59.88 1400x1050 59.95 1600x900 60.00 1280x1024 75.02 60.02 1440x900 59.90 1280x800 59.91 1152x864 75.00 1280x720 60.00 1024x768 75.03 60.00 832x624 74.55 800x600 75.00 60.32 56.25 640x480 75.00 59.94 720x400 70.08 DVI-I-2 disconnected (normal left inverted right x axis y axis) HDMI-1 disconnected (normal left inverted right x axis y axis) DP-1 disconnected (normal left inverted right x axis y axis) z411@kureha:~$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 302 frames in 5.0 seconds = 60.312 FPS 300 frames in 5.0 seconds = 59.990 FPS 300 frames in 5.0 seconds = 59.992 FPS 300 frames in 5.0 seconds = 59.992 FPS 300 frames in 5.0 seconds = 59.994 FPS XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 4713 requests (4713 known processed) with 0 events remaining. z411@kureha:~$ xrandr --output DVI-I-1 --mode 1600x900 z411@kureha:~$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 15457 frames in 5.0 seconds = 3091.385 FPS 15522 frames in 5.0 seconds = 3104.327 FPS 15495 frames in 5.0 seconds = 3098.860 FPS XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 152686 requests (152686 known processed) with 0 events remaining. z411@kureha:~$ xrandr --output DVI-I-1 --mode 1920x1080 z411@kureha:~$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 15806 frames in 5.0 seconds = 3161.190 FPS 16491 frames in 5.0 seconds = 3298.103 FPS 15422 frames in 5.0 seconds = 3084.263 FPS XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 159884 requests (159884 known processed) with 0 events remaining. z411@kureha:~$ --------- SITUATION (2) --------- z411@kureha:~$ xrandr Screen 0: minimum 320 x 200, current 3840 x 1088, maximum 16384 x 16384 DVI-I-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 290mm 1920x1080 60.00*+ 1680x1050 59.88 1400x1050 59.95 1600x900 60.00 1280x1024 75.02 60.02 1440x900 59.90 1280x800 59.91 1152x864 75.00 1280x720 60.00 1024x768 75.03 60.00 832x624 74.55 800x600 75.00 60.32 56.25 640x480 75.00 59.94 720x400 70.08 DVI-I-2 disconnected (normal left inverted right x axis y axis) HDMI-1 connected 1920x1080+1920+8 (normal left inverted right x axis y axis) 698mm x 392mm 1920x1080 50.00*+ 60.00 59.94 24.00 23.98 1920x1080i 60.00 50.00 59.94 1280x720 60.00 50.00 59.94 720x576 50.00 720x480 60.00 59.94 640x480 60.00 59.94 DP-1 disconnected (normal left inverted right x axis y axis) z411@kureha:~$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 303 frames in 5.0 seconds = 60.461 FPS 301 frames in 5.0 seconds = 60.001 FPS 301 frames in 5.0 seconds = 60.000 FPS XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 2876 requests (2876 known processed) with 0 events remaining. z411@kureha:~$ xrandr --output DVI-I-1 --off z411@kureha:~$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 15446 frames in 5.0 seconds = 3089.164 FPS 15492 frames in 5.0 seconds = 3098.377 FPS 15502 frames in 5.0 seconds = 3100.288 FPS XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 159083 requests (159083 known processed) with 0 events remaining. z411@kureha:~$ --------- SITUATION (3) --------- z411@kureha:~$ xrandr Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384 DVI-I-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 290mm 1920x1080 60.00*+ 1680x1050 59.88 1400x1050 59.95 1600x900 60.00 1280x1024 75.02 60.02 1440x900 59.90 1280x800 59.91 1152x864 75.00 1280x720 60.00 1024x768 75.03 60.00 832x624 74.55 800x600 75.00 60.32 56.25 640x480 75.00 59.94 720x400 70.08 DVI-I-2 disconnected (normal left inverted right x axis y axis) HDMI-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 698mm x 392mm 1920x1080 50.00*+ 60.00 59.94 24.00 23.98 1920x1080i 60.00 50.00 59.94 1280x720 60.00 50.00 59.94 720x576 50.00 720x480 60.00 59.94 640x480 60.00 59.94 DP-1 disconnected (normal left inverted right x axis y axis) z411@kureha:~$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 302 frames in 5.0 seconds = 60.321 FPS 300 frames in 5.0 seconds = 59.994 FPS 300 frames in 5.0 seconds = 59.995 FPS XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 2919 requests (2919 known processed) with 0 events remaining. z411@kureha:~$ xrandr --output DVI-I-1 --mode 1600x900 z411@kureha:~$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 302 frames in 5.0 seconds = 60.315 FPS 300 frames in 5.0 seconds = 59.996 FPS 300 frames in 5.0 seconds = 59.996 FPS 300 frames in 5.0 seconds = 59.998 FPS XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 3864 requests (3864 known processed) with 0 events remaining. z411@kureha:~$ xrandr --output HDMI-1 --off z411@kureha:~$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 302 frames in 5.0 seconds = 60.342 FPS 301 frames in 5.0 seconds = 60.001 FPS 301 frames in 5.0 seconds = 60.001 FPS 301 frames in 5.0 seconds = 60.001 FPS 301 frames in 5.0 seconds = 60.000 FPS 301 frames in 5.0 seconds = 60.001 FPS XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 5675 requests (5675 known processed) with 0 events remaining. z411@kureha:~/log$ xrandr --output DVI-I-1 --mode 1920x1080 z411@kureha:~/log$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 302 frames in 5.0 seconds = 60.326 FPS 301 frames in 5.0 seconds = 60.001 FPS 301 frames in 5.0 seconds = 60.000 FPS XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 3416 requests (3416 known processed) with 0 events remaining. z411@kureha:~/log$ xrandr --output DVI-I-1 --mode 1600x900 z411@kureha:~/log$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 14956 frames in 5.0 seconds = 2991.131 FPS 15981 frames in 5.0 seconds = 3196.131 FPS 15413 frames in 5.0 seconds = 3082.477 FPS XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 142976 requests (142976 known processed) with 0 events remaining. z411@kureha:~/log$ --------- SITUATION (4) --------- z411@kureha:~$ xrandr Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384 DVI-I-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 290mm 1920x1080 60.00*+ 1680x1050 59.88 1400x1050 59.95 1600x900 60.00 1280x1024 75.02 60.02 1440x900 59.90 1280x800 59.91 1152x864 75.00 1280x720 60.00 1024x768 75.03 60.00 832x624 74.55 800x600 75.00 60.32 56.25 640x480 75.00 59.94 720x400 70.08 DVI-I-2 disconnected (normal left inverted right x axis y axis) HDMI-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 698mm x 392mm 1920x1080 50.00*+ 60.00 59.94 24.00 23.98 1920x1080i 60.00 50.00 59.94 1280x720 60.00 50.00 59.94 720x576 50.00 720x480 60.00 59.94 640x480 60.00 59.94 DP-1 disconnected (normal left inverted right x axis y axis) z411@kureha:~$ glxgears # Running on HDMI-1 Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 249 frames in 5.0 seconds = 49.750 FPS 251 frames in 5.0 seconds = 50.001 FPS 251 frames in 5.0 seconds = 50.001 FPS ^C z411@kureha:~$ xrandr --output HDMI-1 --mode 1280x720 z411@kureha:~$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 7345 frames in 5.0 seconds = 1468.846 FPS 7384 frames in 5.0 seconds = 1476.672 FPS 7382 frames in 5.0 seconds = 1476.214 FPS ^C z411@kureha:~$ glxgears # Now running on DVI-I-1 Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 300 frames in 5.0 seconds = 59.976 FPS 301 frames in 5.0 seconds = 60.002 FPS 301 frames in 5.0 seconds = 60.000 FPS ^C z411@kureha:~$