[linux-dvb] Scart Pin 8 (TV turns on)

Johannes Stezenbach js at linuxtv.org
Sun Jul 10 15:07:50 CEST 2005


Hanno Mueller wrote:
> Scart cable connections have the nasty habit of turning on the TV and
> switching to AV when a video source is swichted on. Very annoying,
> especially when my Linux vdr turns itself on in the middle of the night
> to record a tv show and the tv awakes from standby, too, blasting sound
> in the living room.
> 
> 
> So far, I found out that Pin 8 is the reason for this. But I also read
> that I should not just disconnect it, as Pin 8 is used for both the
> "look at me" signal (12 volts) and the "this is widescreen" signal (6
> volts).
> 
> Is there any software or driver setting I can use to avoid this?

I believe that this is different for different cards, but
AFAIK the cards do not use pin 8 for widescreen signalling,
instead they signal WSS via VBI. For some cards pin 8 can
be controlled (only on/off) via saa7146 or av7110 GPIOs,
just grep for SCART in av7110.c and do some experiments.

Johannes




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