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[Guy <1302090@xxxxxxxxxxxxxxxxxx>]

Nobody to help ? Could someone confirme that you don't need to plug the
headphones to get the subwoofer working ? Here is what I have in syslog
concerning the hda-intel :

01-14 03:44 kernel: [    5.318176] hda-intel 0000:00:03.0: Applying patch firmware 'hda-jack-retask.fw'
01-14 03:44 kernel: [    5.318333] hda-intel 0000:00:1b.0: Applying patch firmware 'hda-jack-retask.fw'
01-14 03:44 kernel: [    5.319998] HDA driver get symbol successfully from i915 module
01-14 03:44 kernel: [    5.320025] snd_hda_intel 0000:00:1b.0: irq 47 for MSI/MSI-X
01-14 03:44 kernel: [    5.327609] snd_hda_intel 0000:00:03.0: irq 48 for MSI/MSI-X
01-14 03:44 kernel: [    5.330441] SKU: Nid=0x1d sku_cfg=0x41000001
01-14 03:44 kernel: [    5.330443] SKU: port_connectivity=0x1
01-14 03:44 kernel: [    5.330444] SKU: enable_pcbeep=0x0
01-14 03:44 kernel: [    5.330445] SKU: check_sum=0x00000000
01-14 03:44 kernel: [    5.330445] SKU: customization=0x00000000
01-14 03:44 kernel: [    5.330446] SKU: external_amp=0x0
01-14 03:44 kernel: [    5.330447] SKU: platform_type=0x0
01-14 03:44 kernel: [    5.330448] SKU: swap=0x0
01-14 03:44 kernel: [    5.330448] SKU: override=0x1
01-14 03:44 kernel: [    5.330717] autoconfig: line_outs=1 (0x1a/0x0/0x0/0x0/0x0) type:line
01-14 03:44 kernel: [    5.330718]    speaker_outs=1 (0x14/0x0/0x0/0x0/0x0)
01-14 03:44 kernel: [    5.330720]    hp_outs=2 (0x15/0x16/0x0/0x0/0x0)
01-14 03:44 kernel: [    5.330720]    mono: mono_out=0x0
01-14 03:44 kernel: [    5.330721]    inputs:
01-14 03:44 kernel: [    5.330723]      Mic=0x19
01-14 03:44 kernel: [    5.330724]      Internal Mic=0x12
01-14 03:44 kernel: [    5.330725] realtek: No valid SSID, checking pincfg 0x41000001 for NID 0x1d
01-14 03:44 kernel: [    5.330726] realtek: Enabling init ASM_ID=0x0001 CODEC_ID=10ec0668
01-14 03:44 kernel: [    5.336462] input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card1/input12
01-14 03:44 kernel: [    5.336517] input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card1/input11
01-14 03:44 kernel: [    5.336563] input: HDA Intel PCH Speaker as /devices/pci0000:00/0000:00:1b.0/sound/card1/input10
01-14 03:44 kernel: [    5.336612] input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1b.0/sound/card1/input9
01-14 03:44 kernel: [    5.336661] init: failsafe main process (810) killed by TERM signal
01-14 03:44 kernel: [    5.340994] input: HDA Intel HDMI HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:03.0/sound/card0/input15
01-14 03:44 kernel: [    5.341064] input: HDA Intel HDMI HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/sound/card0/input14
01-14 03:44 kernel: [    5.341113] input: HDA Intel HDMI HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:03.0/sound/card0/input13

Thank you.

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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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