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[Maurizio <maurizio.laurenti@xxxxxxxxx>]

I' ve a problem.
If I start Lubuntu 14:04, with main power supply, normal sound from the headphones and no sound from speakers.
Everything is enabled both on alsamixer and pavucontro.
I turn off the laptop and boot from a USB key with Live VectorLinux.
Perfect sound from the speakers
I turn off the laptop, I remove the key, I start again Lubuntu and I' ve perfect sound from the speakers.
Then I restart again, always with the main power supply and sound always perfect.
I turn it off,I take off the main power supply and I restart Lubuntu using the battery and ... no sound from the speakers,from the headphones only.
I repeat the cycle from the start and I always get the same result.
In addition to an exorcism, what can I do? 
Best regards.

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Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1265611

Title:
  No sound with HDA Intel, VIA VT8237A/VT8251, kernel 3.12

Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  After updating my system to Ubuntu Trusty Tahr (development branch) Release:  14.04
  my soundcard VIA Technologies, Inc. VT8237A/VT8251 HDA Controller is not working anymore on the newer kernel (3.12).
  After booting an older kernel  (3.2) the card is working.

  Already tried various options in /etc/modprobe.d/alsa-base.conf, 
  e.g. options snd-hda-intel probe_mask=1 model=3stack-dig but without success

  Configuration infos
  lspci: 04:01.0 Audio device: VIA Technologies, Inc. VT8237A/VT8251 HDA Controller

  Bad system configuration:
  ------------------------------
  Linux version 3.12.0-7-generic (buildd@aatxe) (gcc version 4.8.2 (Ubuntu/Linaro 4.8.2-8ubuntu1) ) #15-Ubuntu SMP Sun Dec 8 23:39:27 UTC 2013 (Ubuntu 3.12.0-7.15-generic 3.12.4)

  [    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.12.0-7-generic
  root=UUID=cd684c44-c353-4cdf-8242-a865c65b61b3 ro quiet splash
  vt.handoff=7

  [   21.342849] hda-intel 0000:04:01.0: Using VIACOMBO position fix
  [   21.342893] snd_hda_intel 0000:04:01.0: irq 68 for MSI/MSI-X
  [   22.348029] hda-intel 0000:04:01.0: Codec #0 probe error; disabling it...
  [   27.384025] hda-intel 0000:04:01.0: no codecs initialized

  uploded alsa info of bad configuration:
  http://www.alsa-project.org/db/?f=c1cebc6d64b60684489e6143a813f529d01bc410

  
  Good system configuration:
  --------------------------------
  Linux version 3.2.0-56-generic (buildd@roseapple) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #86-Ubuntu SMP Wed Oct 23 09:20:45 UTC 2013 (Ubuntu 3.2.0-56.86-generic 3.2.51)
  [    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-56-generic root=UUID=cd684c44-c353-4cdf-8242-a865c65b61b3 ro quiet splash vt.handoff=7

  
  [   23.147203] snd_hda_intel 0000:04:01.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
  [   23.147262] snd_hda_intel 0000:04:01.0: irq 68 for MSI/MSI-X
  [   23.147292] snd_hda_intel 0000:04:01.0: setting latency timer to 64
  [   26.196033] hda-intel: azx_get_response timeout, switching to polling mode: last cmd=0x000f0001
  [   27.144807] hda_codec: ALC888: BIOS auto-probing.
  [   27.144813] hda_codec: ALC888: SKU not ready 0x411111f0
  [   27.153432] input: HDA VIA VT82xx Line as /devices/pci0000:00/0000:00:13.0/0000:04:01.0/sound/card0/input7
  [   27.153568] input: HDA VIA VT82xx Mic as /devices/pci0000:00/0000:00:13.0/0000:04:01.0/sound/card0/input8
  [   27.153684] input: HDA VIA VT82xx Front Headphone as /devices/pci0000:00/0000:00:13.0/0000:04:01.0/sound/card0/input9
  [   27.153801] input: HDA VIA VT82xx Line-Out Side as /devices/pci0000:00/0000:00:13.0/0000:04:01.0/sound/card0/input10
  [   27.153914] input: HDA VIA VT82xx Line-Out CLFE as /devices/pci0000:00/0000:00:13.0/0000:04:01.0/sound/card0/input11
  [   27.154022] input: HDA VIA VT82xx Line-Out Surround as /devices/pci0000:00/0000:00:13.0/0000:04:01.0/sound/card0/input12
  [   27.154127] input: HDA VIA VT82xx Line-Out Front as /devices/pci0000:00/0000:00:13.0/0000:04:01.0/sound/card0/input13

  uploded alsa info of good configuration:
  http://www.alsa-project.org/db/?f=39d8e002614a92b0b9f993e3a9c46c7a5e86ae38

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