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f33e652
(Get the code!)
I found schematic for Lenovo Y700 15 ISK and make some investigation.
Ubuntu detects ALC233 as audio chip.
Schematic shows that my mother board got installed the ALC3248 one.
On schematic ALC3248 MONO_OUT and MONO_MUTE pins are connected to audio amp which drives subwoofer.
The problem is ALC233 do not contain such pins. So no matter how we tweak the setup in hdajackretask, there is no chance to solve this issue that way.
First of all we need to find out similar driver, because i was unable to find ALC3248 datasheet to create my own driver or to patch current one.
I think that we need to only match up pinout of ALC3248.