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[Alexander Fedora <alexander.fedora@xxxxxxxxx>]

I'm still doing bisection. Taking a lot of time. Meanwhile I've
collected some logs from good kernel:

APLAY:

**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: AD198x Digital [AD198x Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

ALSA:

Node 0x02 [Audio Output] wcaps 0x30311: Stereo Digital
  Control: name="IEC958 Playback Con Mask", index=0, device=0
  Control: name="IEC958 Playback Pro Mask", index=0, device=0
  Control: name="IEC958 Playback Default", index=0, device=0
  Control: name="IEC958 Playback Switch", index=0, device=0
  Control: name="IEC958 Default PCM Playback Switch", index=0, device=0
  Control: name="IEC958 Playback Source", index=0, device=0
  Device: name="AD198x Digital", type="SPDIF", device=1
  Converter: stream=8, channel=0
  Digital:
  Digital category: 0x0
  IEC Coding Type: 0x0
  PCM:
    rates [0x7e0]: 44100 48000 88200 96000 176400 192000
    bits [0xe]: 16 20 24
    formats [0x5]: PCM AC3
  Delay: 3 samples
  Connection: 3
     0x01* 0x08 0x09
Node 0x03 [Audio Output] wcaps 0x405: Stereo Amp-Out
  Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=0
  Amp-Out vals:  [0x00 0x00]
  Converter: stream=0, channel=0
  Power states:  D0 D3
  Power: setting=D0, actual=D0
Node 0x04 [Audio Output] wcaps 0x405: Stereo Amp-Out
  Control: name="PCM Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Device: name="AD198x Analog", type="Audio", device=0
  Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=0
  Amp-Out vals:  [0x27 0x27]
  Converter: stream=8, channel=0
  Power states:  D0 D3
  Power: setting=D0, actual=D0


Two things to note:

New kernel shows  second  device as "AD1984 Alt Analog", bot good kernel
shows it as "AD198x Digital".

New kernel shows two controls "Headphone Playback Volume" and "Speaker
Playback Volume". But old one shows  single control "PCM Playback
Volume".

-- 
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https://bugs.launchpad.net/bugs/1324384

Title:
  [Lenovo ThinkPad X61s] Speaker volume mutes itself in random intervals
  after upgrade to 14.04

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I've upgraded from ubuntu 13.10 and sound stopped working properly. It works in general. But mutes itself for small period  of time in random intervals. I've looked at alsamixer and it shown what once in a while some of the parameters got to the lowest level and then returning to normal after some time. It is reproing on Speaker. But also Internal Mic Boost jumps from 100% to 0% and then back to 100%. 
  BTW, when sound mutes on speaker, headphones are still working. So looks like alsamixer reports volumes  correctly. I've also tried to purge pulseaudio and alsa-base packages and re-installing them again.

  But I was able to find workaround. Audio works just fine with old
  kernels. I've tried with 3.5.0-15 and 3.5.0-27. It works with both
  kernels. I've also tried newest kernel from next ubuntu version.
  3.15.0-031500rc5 - audio is not working in new kernel.

  $ amixer -c 0 scontents > normal.txt
  SEE Attachment.
  $ amixer -c 0 scontents > muted.txt
  SEE Attachment.
  $ amixer -c 0 scontents > normalagain.txt
  SEE Attachment.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-27-generic 3.13.0-27.50
  ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
  Uname: Linux 3.13.0-27-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ghisguth   2519 F.... pulseaudio
                        ghisguth   3906 F.... pulseaudio
                        ghisguth  15548 F.... alsamixer
  Date: Wed May 28 22:50:29 2014
  HibernationDevice: RESUME=UUID=78076f7a-8340-428e-894b-ce095d0d278e
  InstallationDate: Installed on 2010-04-19 (1501 days ago)
  InstallationMedia: Kubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100406.1)
  MachineType: LENOVO 76693JG
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-27-generic root=/dev/mapper/ubuntu-root ro quiet splash crashkernel=384M-:128M
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-27-generic N/A
   linux-backports-modules-3.13.0-27-generic  N/A
   linux-firmware                             1.127.2
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-25 (33 days ago)
  dmi.bios.date: 10/22/2007
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7NET29WW (1.10 )
  dmi.board.name: 76693JG
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr7NET29WW(1.10):bd10/22/2007:svnLENOVO:pn76693JG:pvrThinkPadX61s:rvnLENOVO:rn76693JG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 76693JG
  dmi.product.version: ThinkPad X61s
  dmi.sys.vendor: LENOVO

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