https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/log/sound/pci/hda/patch_realtek.c?qt=grep&q=thinkpad
do you mean regression of recent update ?
** Changed in: alsa-driver (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1306843
Title:
Lenovo X230 Mute Button Does Not Mute Sound
Status in “alsa-driver” package in Ubuntu:
Incomplete
Bug description:
Ubuntu 14.04 updated as on 4/11/2014
Action: Listen to audio, Press mute button on keyboard
Expected Result: Mute indicator displays, sound is muted.
Actual Result: Mute indicator displays, sound is not muted.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: cprofitt 1988 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Apr 11 20:18:40 2014
InstallationDate: Installed on 2014-03-16 (26 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140315)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Speaker, Internal
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: None of the above
Title: [232036U, Realtek ALC269VC, Speaker, Internal] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/30/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: G2ET32WW (1.12 )
dmi.board.asset.tag: Not Available
dmi.board.name: 232036U
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrG2ET32WW(1.12):bd05/30/2012:svnLENOVO:pn232036U:pvrThinkPadX230:rvnLENOVO:rn232036U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 232036U
dmi.product.version: ThinkPad X230
dmi.sys.vendor: LENOVO
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