GNet Solutions » GNU/Linux Administration

While trying to turn off the display used on the HDMI port of my Raspberry Pi 2, I was unable to get the vcgencmd to work correctly.

To resolve this, the dtoverlay needs to be changed in the config.txt file.

• Edit the config.txt:
  

  sudo nano /boot/firmware/config.txt
  

  • And modify the following line, changing dtoverlay to:
    

    dtoverlay=vc4-fkms-v3d
    

• Reboot the system:
  

  sudo reboot
  

• Now vcgencmd should be able to turn the HDMI display off:
  

  sudo vcgencmd display_power 0
  

Resources¶

• https://www.reddit.com/r/raspberry_pi/comments/jyvj5q/heres_how_i_turn_my_monitors_on_and_off/