Xorg&
export DISPLAY=:0.0
matchbox-window-manager& matchbox-session&
root@plnx_aarch64:~# xrandr Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 4096 x 4096 DP-1 connected 3840x2160+0+0 953mm x 543mm 3840x2160 29.98* 2560x1600 59.97 1920x1080 60.00 50.00 59.94 1680x1050 59.95 1280x1024 75.02 60.02 1440x900 74.98 59.89 1280x960 60.00 1366x768 59.79 1280x720 60.00 50.00 59.94 1024x768 75.03 60.00 800x600 75.00 60.32 720x576 50.00 720x480 60.00 59.94 640x480 75.00 72.81 66.67 60.00 59.94 720x400 70.08 root@plnx_aarch64:~# xrandr -s 1920x1080 root@plnx_aarch64:~# xrandr -s 640x480
'xset' changes some setting. Change of power states can be done as below.
root@plnx_aarch64:~# sleep 1; xset dpms force on #Sleep adds a delay to help X from getting confused on the order of events root@plnx_aarch64:~# sleep 1; xset dmps force off