Am 21.01.2016 um 12:45 schrieb Takashi Iwai:

On Wed, 20 Jan 2016 19:22:06 +0100, Sebastian Wagner wrote:

...

Hi list,

the "Acer Aspire V 15 Nitro" has a combined headphone + microphone jack. The headphone worked out-of-the-box (Ubuntu 15.10), but no microphone was recognized. Also, I couldn't find anything about "Realtek ALC255" in my /usr/share/doc/alsa-base/driver/HD-Audio-Models.txt.gz

after some googling, I've managed to get my microphone jack working: Adding "options snd-hda-intel model=dell-headset-multi" fixed the issue. See https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1420988 for a similar setup. As the bug is still open, I thought this might be of interest.

I've attached my alsa-info.txt

Does the machine have no built-in mic? In alsa-info.sh output, there are only "Headphone Mic" and "Headset Mic" as inputs. Also, does the headphone output still works with this quirk?

In anyway, please give alsa-info.sh output without the model option, too.

Hi,

It does, but it is not detected:

* internal speakers are working fine with and without quirk * internal mic doesn't work * headphone works with and without quirk * headset mic only works with quirk. * I didn't tested anything connected via HDMI

I've attached the alsa-info.txt without option. Also, with the quirk, the alsamixer input throttles are not very intuitive. I have these throttles:

1. Headphone Mic boost 2. Capture 3. Capture 1 4. Headset Mic boost 5. Input Source 6. Input Source 1

I'm still trying to find the ones that have an effect.

Sebastian