snk 0 Posted June 5, 2023 Hello. I'm trying to reduce the power consumption of Tinkerboard R2.0 as much as possible. I was able to disable the HDMI output on the raspberry pi. Is the same possible with tinkerboard? Share this post Link to post Share on other sites
tooz 47 Posted June 6, 2023 hello @snk, you can turn it off with xrandr: xrandr --output HDMI-1 --off Share this post Link to post Share on other sites
snk 0 Posted June 6, 2023 hello @tooz The following error message is displayed. Can't open display :0 I could not run it as root user. Does it have anything to do with the display being in CUI mode? Share this post Link to post Share on other sites
tooz 47 Posted June 7, 2023 hello @snk, please try: su linaro export DISPLAY=:0 xrandr --output HDMI-1 --off or you can disable hdmi in kernel: sudo su echo off > /sys/class/drm/card0-HDMI-A-1/status (if you'd like to enable it, then it's echo on > /sys/class/drm/card0-HDMI-A-1/status ) Share this post Link to post Share on other sites
snk 0 Posted June 7, 2023 hello @tooz, I haven't measured the difference in power consumption yet, but I was able to disable the HDMI output. thx. Share this post Link to post Share on other sites
