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[Yung Shen <1169143@xxxxxxxxxxxxxxxxxx>]

There is another Dell XPS 9333 (201309-14238) with the same problem.

I've double checked the workaround that cypressyew mentioned in comment
#28 works with linux-image-3.11.0-18.

Also confirmed that this problem does not happen in linux-
image-3.14.0-031400rc8 [0].

Alsainfo:
http://www.alsa-project.org/db/?f=baf761f88e65ed838af4f66cbace653413feffbf

lspci -nnvv|grep Audio -A9:
00:03.0 Audio device [0403]: Intel Corporation Device [8086:0a0c] (rev 09)
	Subsystem: Dell Device [1028:060a]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 63
	Region 0: Memory at f0510000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd-hda-intel

--
00:1b.0 Audio device [0403]: Intel Corporation Lynx Point-LP HD Audio Controller [8086:9c20] (rev 04)
	Subsystem: Dell Device [1028:060a]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 64
	Region 0: Memory at f0514000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd-hda-intel


[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.14-rc8-trusty/

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https://bugs.launchpad.net/bugs/1169143

Title:
  Headset support on some Dell machines

Status in HWE Next Project:
  Fix Released
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux-lts-raring” package in Ubuntu:
  Won't Fix
Status in “pulseaudio” package in Ubuntu:
  Fix Released
Status in “pulseaudio” source package in Precise:
  Fix Released
Status in “pulseaudio” source package in Raring:
  Won't Fix

Bug description:
  [SRU Justification]
  Several new hardware has either headset jacks or headphone-or-mic jacks, where the system cannot detect what has been plugged in. E g, for such a headset jack you can either plug in a headphone or a headset, but since the system cannot tell which one it is, you have to manually tell the system whether you want to use the internal or external mic.
  In the case of a headphone-or-mic jack, you can have the jack functioning as either a headphone or a mic, but not as a headset.

  Without this patch, PulseAudio would not detect the jack correctly,
  and not making all options available to the user.

  [Regression Potential] is very low: this only affects machines with
  the specific name "Headphone Mic Jack" or "Headset Mic Jack", which
  started to appear for a few machines in the 3.5 kernel. People who are
  running 12.04.0 or 12.04.1 will be unaffected. More machines are
  coming in the 3.10 kernel, so this is also a preparation for making
  certification easier later on.

  [Test case] On an affected machine, plug in something into the jack.
  Then go to "Sound Settings" and note what options there are: e g, for
  a headset jack, you should be able to select both external and
  internal mic manually.

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