I've compared the schematics of w230st and w230ss from the service manuals and the codec is exactly the same, but the w230ss has an additional chip between the codec and the headphone jack. The manual says that it's an pre-amp but doesn't mention the exact model. The pre- amp is connected to the SMBus, I guess it needs initialization after standby.
The service manual also has photos of the motherboard, unfortunately they are low-res and it's not possible to identify the chip. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1313904 Title: [W230SS, VIA VT1802, Green Headphone Out, Front] No sound after fresh boot Status in ALSA driver: Unknown Status in “alsa-driver” package in Ubuntu: Confirmed Bug description: When I boot Windows and then reboot into Ubuntu the sound is ok. But when I am booting after turning laptop on there are no sound in headphone jack. Mic jack works fine. Also heaphone stop working after putting laptop to sleep. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: alsa-base 1.0.25+dfsg-0ubuntu4 Uname: Linux 3.15.0-031500rc2-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: mik 2139 F.... pulseaudio /dev/snd/controlC1: mik 2139 F.... pulseaudio CurrentDesktop: Unity Date: Mon Apr 28 23:20:59 2014 InstallationDate: Installed on 2014-04-26 (2 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed Symptom_Card: Вбудоване аудіо - HDA Intel PCH Symptom_DevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: mik 2139 F.... pulseaudio /dev/snd/controlC1: mik 2139 F.... pulseaudio Symptom_Jack: Green Headphone Out, Front Symptom_Type: No sound at all Title: [W230SS, VIA VT1802, Green Headphone Out, Front] No sound at all UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/11/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 4.6.5 dmi.board.asset.tag: Tag 12345 dmi.board.name: W230SS dmi.board.vendor: Notebook dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Notebook dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd02/11/2014:svnNotebook:pnW230SS:pvrNotApplicable:rvnNotebook:rnW230SS:rvrNotApplicable:cvnNotebook:ct9:cvrN/A: dmi.product.name: W230SS dmi.product.version: Not Applicable dmi.sys.vendor: Notebook mtime.conffile..etc.modprobe.d.alsa.base.conf: 2014-04-28T23:13:10.065027 To manage notifications about this bug go to: https://bugs.launchpad.net/alsa-driver/+bug/1313904/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
