Solution: alsamixer shows a control for IEC958 (which means digital output), and also that the codec chip is Realtek ALC850. Docs from Realtek show that digital output is at pin 48, and it can directly drive TOSLINK transmitters like TOTX176.
Black blob on lower left is the TOTX176 (or TOTX178 or something like that, I'm not sure as I took it from a broken DVD player), 100nF capacitor between its ground and Vcc and a pin header for those, signal wire going to Realtek chip with a loop through a connector to remove physical strain on the soldering. Added a launcher button to XFCE4 (the window manager I use), executing "/usr/bin/amixer 'IEC958' toggle"; meaning that clicking it will toggle the output on-off.
Problem solved. :)
Ei kommentteja:
Lähetä kommentti