I am using an LCD monitor as the display for my MythTV box, connected via an analog RGB (a.k.a. VGA) cable. This allows me to use DPMS (Display Power Management Signaling) to turn the monitor on and off from the MythTV box.
Instructions for setting this up with MythTV are here , but I found that I had to make a few changes to get things to work correctly. I modified one line of the shell script as follows:
STATUS=$( xset -q | grep "Monitor is" | awk '{print $3}' )
I also had to modify my startup script to run irexec in daemon mode. Now my TV_POWER button toggles the power state of the monitor!
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