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[Bug 1302090] Re: Dell Alienware 14, Speaker sound output is mono until a headphone jack is plugged

 

you are using old version of alsa driver if you still find the name is
alc668 since the driver had rename alc668 on those dell computers to
alc3661

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda?id=4b016931a997be59a2be0da3398985a19fdfa5be


static struct alc_codec_rename_pci_table rename_pci_tbl[] = {
+	{ 0x10ec0280, 0x1028, 0, "ALC3220" },
+	{ 0x10ec0282, 0x1028, 0, "ALC3221" },
+	{ 0x10ec0283, 0x1028, 0, "ALC3223" },
+	{ 0x10ec0292, 0x1028, 0, "ALC3226" },
+	{ 0x10ec0255, 0x1028, 0, "ALC3234" },
+	{ 0x10ec0668, 0x1028, 0, "ALC3661" },
+	{ } /* terminator */
+};

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https://bugs.launchpad.net/bugs/1302090

Title:
  Dell Alienware 14, Speaker sound output is mono until a headphone jack
  is plugged

Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  Here's the required release and package information:

      Description:    Ubuntu Trusty Tahr (development branch)
      Release:        14.04

      Package: linux-image-extra-3.13.0-19-generic
      Version: 3.13.0-19.40

  When playing audio through speakers on my Alienware 14 2014, the sound
  output is in mono until I plug a headphone in any of the two available
  headphone jacks (obviously, the auto-mute option must be disabled).
  When I do so, the sound starts to play in stereo.

  I would love the sound output to be stereo by default and not be
  forced to plug anything to achieve that.

  Attached is the alsa-info.sh output for my machine.

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