http://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/log/sound/pci/hda/patch_cirrus.c
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1234252 Title: [MacBookPro8,1, CS4206] Left speaker low volume and absence of low freqs Status in “linux” package in Ubuntu: Confirmed Bug description: Ubuntu 13.04 fresh install or fully updated - no difference. While listening music through internal speakers I noticed that left speaker sounds differently from the right one. I would describe left speaker's sound as those from the headphones lying on the table: low volume level and mostly high frequences are heard. 1) Trying to check mixer levels in alsamixer, muting/unmuting, balance channels etc didnt help. 2) In alsamixer there is a mixer item called "Bass Speaker". If I mute it, other playback items (including Master) are muted too. If I make its level to 0, then sound from both speakers become identical: low volume and without bass frequences. Level of the Bass Speaker resets if I adjust volume level from Unity volume control tool. 3) Trying to set model parameter for intel_hda module to "mbp55" or "imac27" didnt help. 4) Sound from headphones is perfectly ok. ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: alsa-base 1.0.25+dfsg-0ubuntu4 ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8 Uname: Linux 3.8.0-19-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.9.2-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: vkat 1970 F.... pulseaudio /dev/snd/pcmC0D0c: vkat 1970 F...m pulseaudio Date: Wed Oct 2 19:12:40 2013 InstallationDate: Installed on 2013-10-02 (0 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MarkForUpload: True PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed Symptom_Card: Built-in Audio - HDA Intel PCH Symptom_Jack: Speaker, Internal Symptom_Type: High background noise, or volume is too low Title: [MacBookPro8,1, Cirrus Logic CS4206, Speaker, Internal] Background noise or low volume UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/24/12 dmi.bios.vendor: Apple Inc. dmi.bios.version: MBP81.88Z.0047.B27.1201241646 dmi.board.asset.tag: Base Board Asset Tag# dmi.board.name: Mac-94245B3640C91C81 dmi.board.vendor: Apple Inc. dmi.board.version: MacBookPro8,1 dmi.chassis.type: 10 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-94245B3640C91C81 dmi.modalias: dmi:bvnAppleInc.:bvrMBP81.88Z.0047.B27.1201241646:bd01/24/12:svnAppleInc.:pnMacBookPro8,1:pvr1.0:rvnAppleInc.:rnMac-94245B3640C91C81:rvrMacBookPro8,1:cvnAppleInc.:ct10:cvrMac-94245B3640C91C81: dmi.product.name: MacBookPro8,1 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1234252/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
