如何在树莓派上禁用/启用HDMI ?

So I can use "tvservice -o" to turn off the HDMI on the raspberry Pi, and "tvservice -p" to turn it back on. After turning it back on I apparently need to do "fbset -depth 8 && fbset -depth 16" to re-enable the frame buffer and then force an X11 redraw.So I can use "tvservice -o" to turn off the HDM