[SATELLITE L750, Conexant CX20585, Speaker, Internal] fails after a while

[Zsolt Lakatos]

no sound after few minutes

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: ncssrtnvnthm 1844 F.... pulseaudio
 /dev/snd/controlC0: ncssrtnvnthm 1844 F.... pulseaudio
 /dev/snd/pcmC0D0p: ncssrtnvnthm 1844 F...m pulseaudio
CurrentDesktop: Unity
Date: Tue Jun 17 10:19:47 2014
InstallationDate: Installed on 2014-05-24 (23 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Speaker, Internal
Symptom_Type: Sound works for a while, then breaks
Title: [SATELLITE L750, Conexant CX20585, Speaker, Internal] fails after a while
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/26/2012
dmi.bios.vendor: INSYDE
dmi.bios.version: 3.60
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Base Board Product Name
dmi.board.vendor: Intel Corp.
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: OEM Chassis Manufacturer
dmi.chassis.version: OEM Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvr3.60:bd06/26/2012:svnTOSHIBA:pnSATELLITEL750:pvrPSK30E-02000JHU:rvnIntelCorp.:rnBaseBoardProductName:rvrBaseBoardVersion:cvnOEMChassisManufacturer:ct10:cvrOEMChassisVersion:
dmi.product.name: SATELLITE L750
dmi.product.version: PSK30E-02000JHU
dmi.sys.vendor: TOSHIBA
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2014-06-17T09:56:38.909540

[Raymond (superquad-vortex2)]

https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/870419

strange that the driver only use first audio output when there are two

Node 0x10 [Audio Output] wcaps 0xc1d: Stereo Amp-Out R/L
  Control: name="Master Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Device: name="CONEXANT Analog", type="Audio", device=0
  Amp-Out caps: ofs=0x4a, nsteps=0x4a, stepsize=0x03, mute=1
  Amp-Out vals: [0x4a 0x4a]
  Converter: stream=8, channel=0
  PCM:
    rates [0x560]: 44100 48000 96000 192000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
  Power states: D0 D1 D2 D3 D3cold EPSS
  Power: setting=D0, actual=D0
Node 0x11 [Audio Output] wcaps 0xc1d: Stereo Amp-Out R/L
  Amp-Out caps: ofs=0x4a, nsteps=0x4a, stepsize=0x03, mute=1
  Amp-Out vals: [0x3c 0x3c]
  Converter: stream=0, channel=0
  PCM:
    rates [0x560]: 44100 48000 96000 192000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
  Power states: D0 D1 D2 D3 D3cold EPSS
  Power: setting=D0, actual=D0

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ercan MUTLU (fercanm)]

CAUSE OF CRAPPY SOUND CHIP, AFTER 1,5-2 YEARS OF USAGE IT DOESNT WORK PROPERLY.(BUT IT WORKS ALWAYS ON JACK MODE,EXTERNAL SPEAKARS WORKS FOR A WHILE DEPENDS ON OVERHEATING OF SOUND CHIP I TAKES 3-5 MINUTS.)
SOLUTION :
PLACE ON TO THE SOUND CHIP 0.6 mm X 3cm x 10cm RUBBER PLATE. THIS WILL SOLVE THE ISSUE.
I AM NOT MAKING A JOKE. I AM SERIOUS .

[Ercan MUTLU (fercanm)]

NOT RUBBBER SORY, CUPPER PLATE.
Sorry again of my bad English knowlage.