I'll try to answer your previous email first.
Everything seems identical to how it was in the 4.18-gentoo kernel when not setting the model=alc668-headset option
And using the trick we found:
./hda-verb /dev/snd/hwC0D0 0x20 0x500 0xc3 ./hda-verb /dev/snd/hwC0D0 0x20 0x440 0x00
Made it so loopback worked perfectly fine for both earpieces.
One curiosity however (this is just a small thing) is that the "base" mic level is far lower than when the "Mic" option in alsamixer is set to 100. I don't know if it was this way in 4.18-gentoo, but that's the only thing that doesnt seem correct. Here is a screenshot explaining it: http://i.imgur.com/dKPELX6.png
-Håvard
Den fre. 5. okt. 2018 kl. 12:03 skrev Takashi Iwai tiwai@suse.de:
On Fri, 05 Oct 2018 12:00:30 +0200, Håvard wrote:
And curiously, turning on loopback only made it so the right ear could
hear
the output, while plain noise came from the left earpiece.
Maybe it's a mono mic-in.
When you record from the mic-in, do you get the signals from both left and right channels? Or it's also right-only?
Takashi