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I'm currently trying to write a simple script that turns on and off my monitor connected to the rpi via hdmi-to-dvi cable.

I can turn off the monitor without issue using:

tvservice -o

However when I use tvservice -p the monitor will wake but it will be a blank screen (Monitor is on but is black and keeps try to switch between analog/digital to find a signal.)

I've changed the /boot/config.txt to:

hdmi_force_hotplug=1

I've also disabled screen blanking to no avail.

How can I power on my monitor without it resulting in blank screen?

  • 1
    have you tried this after doing the tvservice -p?: xset dpms force on – raspi-ninja May 17 '15 at 16:42
  • This worked. If you make the comment an answer i'll accept it. It's also worth mentioning that running these commands via ssh won't work. – Nick May 17 '15 at 17:21
3

If you run the following commands(you should be able to run this via ssh if you export display):

export DISPLAY=:0.0
tvservice -p
xset dpms force on
#redo the no-sleep commands if the screen had no sleep enabled before
xset -dpms
xset s off
xset s noblank

It should get your screen back on

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