[SOLVED] no audio thru toslink

[micindev]

So i did ran alsamixer and there was 3 toslink outputs - 16bit, pcm and one without description, all of them at 00 and I was unable to rise them up, I did tryied to hit "m" which muted them and then again, just to set them all back to 00 - but I was able to change output volume on analogue outputs.

hiface custom kernel does not work at all, no audio output from usb using mpd or upmpdcli (tracks wont play at all, not an audio volume issue) - as far as I know, first gen hiface usb>spdif interface was driver dependant, but second gen hiface "two" should be driverless, thus shouldnt require custom kernel, but thats only what I found on google... 

how do I roll back to stock kernel? I was unable to find it on forum