01.09.2014 12:30, Sjoerd Simons wrote: > On Mon, 2014-09-01 at 07:54 +0200, David Henningsson wrote: >> >> On 2014-08-31 20:11, Sjoerd Simons wrote: >>> Recognize the Dock headphone jack in the same way the normal & front >>> headphone jacks are detected. >> >> Hi Sjoerd, >> >> The reason "Headphone" and "Front Headphone" are both in the same path, >> is because they're often mixed, i e, the jack is called "Front >> Headphone" but the volume control is called only "Headphone". >> >> I'm not sure this is also the case for "Dock Headphone". In the case it >> isn't, "Dock Headphone" would need its own path rather than being >> integrated with the normal headphones path. >> >> Could you check this? > > I actually started it out as its own path, only to discover i couldn't > unmix them/mute them seperately :/.. So yes this is definitely the case > for at least my X220T + dock. As far as i could tell from the kernel HDA > sources it seems that all headphone outputs always tend to get setup as > mixed (although i could well be wrong here). > > I'd actually would like them to not be seperately switchable (Such that > e.g. headphones on the laptop can get priority over headphones on the > dock) or rather, have the dock jack turn off when the laptops headphones > are plugged. But it looks like that needs some kernel patching to add > controls to change the HDA routing/pin setup to make that happen. Out of interest, may I look at the codec files for the X220T, both for "docked" and "undocked" cases? (/proc/asound/card0/codec\#0 or something similar) -- Alexander E. Patrakov
