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[Beastyvoid <881340@xxxxxxxxxxxxxxxxxx>]

I tried Morten tricks but it did not work for me. With that I had sound
output only on the rear connector and not anymore on the front
connector, and the volume still did not work.

To see the particular version you're using you need this :

head /proc/asound/card0/codec#0     : the "codec" info gives you the
particular driver

then have a look for this driver in this file :
/usr/share/doc/alsa-base/driver/HD-Audio-Models.txt.gz    : search for your model (ALC662 for me).
There you can see the proper variant of the driver (for me the eeepc-p701, but still not working)

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https://bugs.launchpad.net/bugs/881340

Title:
  master volume does not work with snd-hda-intel on HP Elite 8200

Status in “gstreamer0.10” package in Ubuntu:
  Confirmed

Bug description:
  When changing the volume Up and Down in Ubuntu 11.10 oneiric, the audio volume does not change at all. 
  If you, for example use KWin (or alsamixer) to lower the "Master volume" from 100% to 0%, the volume does not decrease at all, until it reaches 0%. There it is muted. Alsamixer, Kwin, volume button, they all make the same behaviour. It is probably a gstreamer problem, or parameter for the kernel module snd-hda-intel.

  If you change the volume of the PCM output sound in alsamixer, it
  works, reflecting the actual value. But master volume doesn't.

  Hardware sound card : 
  cat /proc/asound/cards 
   0 [PCH            ]: HDA-Intel - HDA Intel PCH
                        HDA Intel PCH at 0xfa020000 irq 48

  lspci -k -v -s 00:1b.0
  00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04)
          Subsystem: Hewlett-Packard Company Device 1494
          Flags: bus master, fast devsel, latency 0, IRQ 48
          Memory at fa020000 (64-bit, non-prefetchable) [size=16K]
          Capabilities: [50] Power Management version 2
          Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
          Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
          Capabilities: [100] Virtual Channel
          Capabilities: [130] Root Complex Link
          Kernel driver in use: HDA Intel
          Kernel modules: snd-hda-intel

  dmidecode :

  System Information
          Manufacturer: Hewlett-Packard
          Product Name: HP Compaq 8200 Elite CMT PC

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