I was able to logon to the touch device with ssh 

a dmesg shows that we have alsa :

Code:
--------------------
    ALSA device list:
  #0: MXC Freescale with SPDIF
  #1: fab4 (ak4420)
  #2: fab4 (wm8974)
  
--------------------



Code:
--------------------
    # amixer contents
  numid=1,iface=MIXER,name='IEC958 Playback Default'
  ; type=IEC958,access=rw------,values=1
  : values=[AES0=0x04 AES1=0x02 AES2=0x00 AES3=0x00]
  numid=2,iface=PCM,name='IEC958 Capture Default',device=1
  ; type=IEC958,access=r-------,values=1
  amixer: Control default element read error: Resource temporarily unavailable
  
  numid=4,iface=PCM,name='IEC958 Q-subcode Capture Default',device=1
  ; type=BYTES,access=r-------,values=12
  amixer: Control default element read error: Resource temporarily unavailable
  
  numid=3,iface=PCM,name='IEC958 Subcode Capture Default',device=1
  ; type=IEC958,access=r-------,values=1
  amixer: Control default element read error: Resource temporarily unavailable
  
  numid=7,iface=PCM,name='IEC958 USyncMode CDText',device=1
  ; type=BOOLEAN,access=rw------,values=1
  : values=off
  numid=5,iface=PCM,name='IEC958 V-Bit Errors',device=1
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
  numid=6,iface=PCM,name='RX Sample Rate',device=1
  ; type=INTEGER,access=r-------,values=1,min=16000,max=96000,step=0
  : values=0
  
--------------------


before i mess around, the follwoing command should switch off the SPDIF
output.

Code:
--------------------
    amixer -c 0 cset name='IEC958 Playback Default' on
--------------------


does somebody have experiences with this?
could a power off on the touch tigger such a command and also on power
on?

thx


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