sound volume fluctuates, NB speaker always on ... [12.04 LTS]

[Mr.T]

Since the update to 3.2.0-51-generic I have a very annoying problem with audio playback:

1.) Volume jumps up and down randomly (even when all levels are 100% in alsamixer)
2.) Even when external speakers are plugged in the audio jack, the NB speakers are active

uname -a
Linux blackbox 3.2.0-51-generic #77-Ubuntu SMP Wed Jul 24 20:18:19 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

lsb_release -rd
Description: Ubuntu 12.04.2 LTS
Release: 12.04

Please let me know, what I can provide to help.
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: HDA Generic [HDA Generic]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: HDA Generic [HDA Generic]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: dc 4852 F.... pulseaudio
 /dev/snd/pcmC0D0p: dc 4852 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xc4400000 irq 44'
   Mixer name : 'Intel ID 2805'
   Components : 'HDA:10ec0269,10250623,00100100 HDA:80862805,10250623,00100000'
   Controls : 5
   Simple ctrls : 4
DistroRelease: Ubuntu 12.04
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MarkForUpload: True
Package: alsa-base 1.0.25+dfsg-0ubuntu1.1
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.2.0-51.77-generic 3.2.48
Tags: precise running-unity
Uname: Linux 3.2.0-51-generic x86_64
UpgradeStatus: Upgraded to precise on 2012-04-26 (471 days ago)
UserGroups: adm admin cdrom dialout lp lpadmin plugdev sambashare
dmi.bios.date: 09/29/2011
dmi.bios.vendor: INSYDE
dmi.bios.version: V1.06
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: HMA51_HR
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvrV1.06:bd09/29/2011:svnAcer:pnAspire5749:pvrV1.06:rvnAcer:rnHMA51_HR:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: Aspire 5749
dmi.product.version: V1.06
dmi.sys.vendor: Acer
modified.conffile..etc.modprobe.d.alsa.base.conf: [modified]
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2013-08-11T04:28:45.740402
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: HDA Generic [HDA Generic]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: HDA Generic [HDA Generic]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: dc 4852 F.... pulseaudio
 /dev/snd/pcmC0D0p: dc 4852 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xc4400000 irq 44'
   Mixer name : 'Intel ID 2805'
   Components : 'HDA:10ec0269,10250623,00100100 HDA:80862805,10250623,00100000'
   Controls : 5
   Simple ctrls : 4
DistroRelease: Ubuntu 12.04
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MarkForUpload: True
Package: alsa-base 1.0.25+dfsg-0ubuntu1.1
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.2.0-51.77-generic 3.2.48
Tags: precise running-unity
Uname: Linux 3.2.0-51-generic x86_64
UpgradeStatus: Upgraded to precise on 2012-04-26 (471 days ago)
UserGroups: adm admin cdrom dialout lp lpadmin plugdev sambashare
dmi.bios.date: 09/29/2011
dmi.bios.vendor: INSYDE
dmi.bios.version: V1.06
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: HMA51_HR
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvrV1.06:bd09/29/2011:svnAcer:pnAspire5749:pvrV1.06:rvnAcer:rnHMA51_HR:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: Aspire 5749
dmi.product.version: V1.06
dmi.sys.vendor: Acer
modified.conffile..etc.modprobe.d.alsa.base.conf: [modified]
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2013-08-11T04:28:45.740402

[Mr.T (thau79)]

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[Raymond (superquad-vortex2)]

you have to remove

options snd-hda-Intel model=generic

from /etc/modprobe.d/alsa-base.conf

[Mr.T (thau79)]

> you have to remove
> options snd-hda-Intel model=generic
> from /etc/modprobe.d/alsa-base.conf

I added this line because I read somewhere, that this would fix the already existing problem.

It didn't help though, and removing it again solves the problem with the NB speakers, BUT NOT with the sound volume fluctuation ...

[Raymond (superquad-vortex2)]

https://wiki.ubuntu.com/Audio/AlsaInfo

[Mr.T (thau79)]

FYI:
This issue is fixed for me now, after an update to 3.2.0-52 (I think a kernel-update was also causing it) ...

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for alsa-driver (Ubuntu) because there has been no activity for 60 days.]