Hi,
Thanks for the quick reply!
I was able to improve the situation by adding this to modprobe.d: options snd-hda-intel model=dell-headset-multi Now, mics and external speakers plugged in work fine (where for mics, I need to manually configure them in pacuvontrol: "Speakers" and "Microphone"). Combined headsets also work (with "Headphones" and "Headset Microphone"), i.e. I get audio in and audio out, but the audio in from the microphone is fairly noisy. I am not sure whether this is due to the headset or the laptop; I am using the same headset with my phone and people I called did not complain about noise. Furthermore, there is a weird effect: I have a headset with *separate* plugs for speaker and mic (which I used above to test the speaker vs. mic functionality). If I plug in the speaker part, but configure it as a microhpone (out: "Speakers", in: "Microphone"), then I actually get a (rather noisy) input signal. Not sure what is going on there, but I'm reasonably sure it is getting that signal from the headset, not the internal mic of the laptop.
It's a configuration with "headphone mic" for Dell, so it doesn't fit with yours properly.
Look at the lspci -nv output, and check the PCI SSID of the corresponding device. Then try to add an entry applying some fixup, e.g. ALC269_FIXUP_ASPIRE_HEADSET_MIC, in alc269_fixup_tbl[] defined in sound/pci/hda/patch_realtek.c:
static const struct snd_pci_quirk alc269_fixup_tbl[] = { ..... SND_PCI_QUIRK(0x1025, XXXX, "Acer Your Model", ALC269_FIXUP_ASPIRE_HEADSET_MIC), .....
There are other definitions for 1025:*, so put your own one there. The list is sorted in the id number order.
There are quite lots of fixup models that can be applied, do figure out by trial-and-error.
I tried a bunch of fixup models (and even defined one myself), but none of them made the internal microhpone work. Funny enough, the definitions involving "DELL" work best.
Here's what I tried:
ALC269_FIXUP_ASPIRE_HEADSET_MIC, ALC255_FIXUP_ASPIRE_HEADSET_MIC [*]: Combined headset plugged into the hack works. PLugging in a "pure" mic doesn't. pavuctl says "Headset Microphone (unplugged)".
ALC255_FIXUP_HEADSET_MODE, ALC255_FIXUP_HEADSET_MODE_NO_HP_MIC: No mic works, pavuctl: "Analog Input"
ALC255_FIXUP_DELL1_MIC_NO_PRESENCE, ALC269_FIXUP_DELL1_MIC_NO_PRESENCE: pavuctl: "Headset Microhpone" & "Microphone". Both kinds of microphone work (after sometimes manually selecting the right thing in pavuctl), but the "pure" mix has a 50 Hz noise on it that goes away when I unplug all cable. Notice that this is running the laptop in a different place and with a different mic than when I previously tried just passing an option to the vanilla module, so I don't know whether the 50 Hz hum also appears in the other conditions. There's no 50 Hz hum with the "combined" headset. There's a weird bug: When starting Audacity, playback breaks and I have to switch (in pavuctl) to "Microphone" and then back to "Headset Microphone" to make it work again.
[*] See attached patch. Notice that I don't know what I am doing here, I am just pattern-matching.
I can't realistically try all the hundreds of fixups, so I tried those that sounded most realistic and those that mention ALC255 (which seems to be the chip I have). However, as can be seen above, ALC269-fixups vs. ALC255-fixups doesn't seem to make any difference.
Kind regards, Ralf