I got a headset and tried it, no autodetection:
sound hdaudioC1D0: Headset jack set to headphone (default) mode.
Regarding 0x19, I guess you are right and it's required for microphones, but I
don't have one to test.
Anyway, the pop noise is heard when switching between these two (Node 0x19):
Pin-ctls: 0x21: IN VREF_50
Pin-ctls: 0x20: IN VREF_HIZ
VREF_50 is used with microphones, VREF_HIZ with headphones and headset.
The pop noise is not a big deal, is heard only once on boot and it's not
that loud.
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1252733
Title:
[XPS 12-9Q33, Realtek ALC668, Black Headphone Out, Left] Background
noise or low volume
Status in “alsa-driver” package in Ubuntu:
Incomplete
Bug description:
When listening to sound on my laptop through headphones, there's a
constant background hiss (which disappears only when all sound has
been stopped for a few seconds. power saving I guess).
I also need to turn the volume *way* down to 10% for the sound volume
to be reasonable (it's way too loud otherwise).
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
Uname: Linux 3.11.0-13-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: martijn 2130 F.... pulseaudio
/dev/snd/pcmC1D0p: martijn 2130 F...m pulseaudio
/dev/snd/controlC0: martijn 2130 F.... pulseaudio
Date: Tue Nov 19 14:26:46 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-11-13 (6 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64
(20131016.1)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
Symptom_Card: Intern geluid - HDA Intel PCH
Symptom_Jack: Black Headphone Out, Left
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: High background noise, or volume is too low
Title: [XPS 12-9Q33, Realtek ALC668, Black Headphone Out, Left] Background
noise or low volume
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/24/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A03
dmi.board.name: XPS 12-9Q33
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias:
dmi:bvnDellInc.:bvrA03:bd09/24/2013:svnDellInc.:pnXPS12-9Q33:pvrA03:rvnDellInc.:rnXPS12-9Q33:rvrA03:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: XPS 12-9Q33
dmi.product.version: A03
dmi.sys.vendor: Dell Inc.
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