Found a crapy workaround here: http://lkml.org/lkml/2013/1/13/11
Get the hda-verb (e.g from here: https://launchpad.net/~diwic/+archive/ppa/+build/2768994/+files/snd-hda- tools_0.20110516%7Eoneiric1_amd64.deb ) Extract the 'hda-verb' from the deb package and then run as root: hda-verb /dev/snd/hwC0D0 0x1f SET_POWER_STATE 0 Turns back the sound, lets see for how long.. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1283168 Title: [SATELLITE L750, Conexant CX20585, Internal Speaker] - Sound from internal speakers fails after a while. Status in “alsa-driver” package in Ubuntu: New Bug description: The sound works ok and after a while fails/disapears. Can not identify what I did, however it was ok month or two ago. I occassionally update recommended updates. My system uses new backported kernel that is not original to Ubuntu 12.04, however with the original updated kernel (the one that is supposed to be current for my Ubutmu version) it also does not work. Surprisingly the internal speakers are the only that suffers with this problem. The HDMI sound works perfect and also headphone jack works well too. I have checked mixer controls with alsamixer and no, I do not have muted outputs. The only weir think I observer is that by default there is enabled controll that has name "Auto-Mute mode". Even when I manualy disable this controll when the speakers playing ok, the bug appears too after a while. I gues that this bug is most likelly related to this one: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1038479 ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: alsa-base 1.0.25+dfsg-0ubuntu1.1 ProcVersionSignature: Ubuntu 3.11.0-15.25~precise1-generic 3.11.10 Uname: Linux 3.11.0-15-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.11.0-15-generic. ApportVersion: 2.0.1-0ubuntu17.6 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: CX20585 Analog [CX20585 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: user 8960 F.... pulseaudio /dev/snd/pcmC0D0p: user 8960 F...m pulseaudio Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xc0700000 irq 46' Mixer name : 'Intel CougarPoint HDMI' Components : 'HDA:14f15069,1179fc50,00100302 HDA:80862805,1179fc50,00100000' Controls : 28 Simple ctrls : 11 Date: Fri Feb 21 19:28:12 2014 InstallationMedia: Kubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1) MarkForUpload: True PackageArchitecture: all ProcEnviron: LANGUAGE= TERM=xterm PATH=(custom, no username) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: alsa-driver Symptom: audio Symptom_Card: Built-in Audio - HDA Intel PCH Symptom_Jack: Mic, Internal Symptom_Type: No auto-switch between inputs Title: [SATELLITE L750, Conexant CX20585, Mic, Internal] No autoswitch UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/21/2011 dmi.bios.vendor: INSYDE dmi.bios.version: 2.90 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:bvr2.90:bd11/21/2011:svnTOSHIBA:pnSATELLITEL750:pvrPSK1WE-0VE00FCZ:rvnIntelCorp.:rnBaseBoardProductName:rvrBaseBoardVersion:cvnOEMChassisManufacturer:ct10:cvrOEMChassisVersion: dmi.product.name: SATELLITE L750 dmi.product.version: PSK1WE-0VE00FCZ dmi.sys.vendor: TOSHIBA mtime.conffile..etc.modprobe.d.alsa.base.conf: 2014-02-21T18:52:37.508508 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1283168/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp