[mythtv-users] Control HDMI output to switch TV on/off

Simon Jones sijones2010 at gmail.com
Tue Nov 8 12:25:42 UTC 2011

> I'm just trialing moving from a VGA connection to HDMI between my Zotac
> IONITX frontend and a Sony Bravia KLV-40V300A TV.
> When using the VGA lead I could power down the TV by blanking the output
> with the following in a script driven from irexec (via the remote control
> power button)
>   /usr/bin/xset dpms force off
> This doesn't work on the HDMI input but there is a facility called "Auto
> TV On" when when enabled (according to the manual) "turns on the TV
> automatically when the HDMI control compatible equipment is turned on."
> Question is, what constitutes being on or off on an Nvidia HDMI connector
> on a Zotac board. Setting blank doesn't do it as the TV seems to be seeing
> a signal that says black screen. Is there a way of "turning off" the HDMI
> connection so the TV turns off?

You need a CEC adapter, search this list for HDMI CEC, the code has
just been submitted to trunk.

More information about the mythtv-users mailing list