<![CDATA[Using a TV as a monitor]]>

<![CDATA[Using a TV as a monitor]]>I know this information can be found in other hardware sites but I thought it might be helpful to have it here. I am using a Sanyo TV as the monitor for my Magic Mirror. I setup a cron to turn off the HDMI output of my Raspberry Pi nightly but when I turned it on in the morning the TV had gone into Standby and would not wake. I found that CEC needed to be turned on in the TV Settings. Then I could use CEC to wake the TV.

Here are my crontab entries for Debian 13.6 (Trixie).

# Turn monitor output on in the morning
0 5 * * * env WAYLAND_DISPLAY=wayland-0 XDG_RUNTIME_DIR=/run/user/1000 /usr/bin/wlr-randr --output HDMI-A-1 --on '*'
# Wake the TV
5 5 * * * echo "on 0" | /usr/bin/cec-client -s -d 1
# Start Magic Mirror
10 5 * * * /home/marksimon/bin/mm start
#####
# Stop Magic Mirror in the Evening
0 20 * * * /home/marksimon/bin/mm stop
# Turn monitor output off in the morning
5 20 * * * env WAYLAND_DISPLAY=wayland-0 XDG_RUNTIME_DIR=/run/user/1000 /usr/bin/wlr-randr --output HDMI-A-1 --off '*'
# Sleep the TV
10 20 * * * echo "off 0" | /usr/bin/cec-client -s -d 1

]]>https://forum.magicmirror.builders/topic/20364/using-a-tv-as-a-monitorRSS for NodeSun, 13 Sep 2026 05:16:49 GMTSat, 12 Sep 2026 18:50:27 GMT60