Hi guys! I have this problem long time. The overheating may not explain the issue, however the issue itself is closely connected to the power management of the hardware.
I investigated the problem and it is basically caused by the decision of the HW to switch the mode of the circuit (programmable HDA switch). Of course as the HW is programable, there is something (I would call it for now codec) that causes the HW beahavior. If the driver for the behavior is the increased temperature (and I believe it is), is secondary. The problem is that the 'codec' together with the Toshiba Satellite L750-129 HW and others (even other brands) is doing bad job. I tried to investigate the problem in order to fix it, however I found I lack of knowledge about complex HDA firmware programing so I withdraw the idea to fix it. VB On 08/26/2015 12:37 AM, Anton wrote: > Does not look like a hardware issue with my Toshiba Satellite L750-129. I > have Windows 7 in dual-boot with OpenSuSe 13.2 and speakers do ALWAYS work on > Windows 7, and do not work on OpenSuSe. Claims about overheating do not > explain this. > Moreover my colleague has Satellite L755 with same Win7/OpenSuSe13.2 > configuration and experiences exactly same problems. > -- 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/1038479 Title: [Satellite L755, Conexant CX20585, Speaker, Internal] fails after a while Status in alsa-driver package in Ubuntu: Confirmed Bug description: Restart will fix the issue, but sound always quits from internal speaker. Headphones work always. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: alsa-base 1.0.25+dfsg-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24 Uname: Linux 3.2.0-29-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu12 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: bernie 1838 F.... pulseaudio Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xc0600000 irq 44' Mixer name : 'Intel CougarPoint HDMI' Components : 'HDA:14f15069,1179fc50,00100302 HDA:80862805,1179fc50,00100000' Controls : 24 Simple ctrls : 11 Date: Sat Aug 18 11:18:34 2012 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) PackageArchitecture: all ProcEnviron: LANGUAGE=en_US:en PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash 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 L755, Conexant CX20585, Speaker, Internal] fails after a while UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/13/2011 dmi.bios.vendor: INSYDE dmi.bios.version: 2.20 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:bvr2.20:bd07/13/2011:svnTOSHIBA:pnSatelliteL755:pvrPSK1WU-05N004:rvnIntelCorp.:rnBaseBoardProductName:rvrBaseBoardVersion:cvnOEMChassisManufacturer:ct10:cvrOEMChassisVersion: dmi.product.name: Satellite L755 dmi.product.version: PSK1WU-05N004 dmi.sys.vendor: TOSHIBA To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1038479/+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