Comment 4 for bug 859704

A big part of this problem is that the HDA kernel driver is fragmented, so the code used for IDT codecs is different from the one from Realtek codecs. And so they use different naming conventions, and I chose the Realtek convention here.
I intend to fix that up for the P cycle, so that then naming convention is similar.

For the output, that's actually a line-out (rather than headphone) jack, or at least is listed so by BIOS, and IIRC jack sensing for line outs is not implemented in the IDT kernel driver.