I have the exact same problem, speaker-test detects 1 channel and only tests left. Audio from one speaker only, got 2 speakers and a subwoofer too (JBL Built-in laptop speakers). Laptop: Samsung Series 7 NP700Z5C- S01US.
-- 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/1005637 Title: [700G7C, Realtek ALC269VC, Speaker, Internal] Playback problem Status in “alsa-driver” package in Ubuntu: Confirmed Bug description: On a fresh install sound only comes out of one speaker. When plugging in a headphone the sound is muted. Laptop has 2 internal speakers and 1 subwoofer. I don't think the subwoofer is being used properly. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: alsa-base 1.0.25+dfsg-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16 Uname: Linux 3.2.0-24-generic x86_64 NonfreeKernelModules: nvidia AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu7 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog [ALC269VC Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: sandsb01 1284 F.... pulseaudio /dev/snd/controlC0: sandsb01 1284 F.... pulseaudio Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xf7310000 irq 49' Mixer name : 'Realtek ALC269VC' Components : 'HDA:10ec0269,144dc0d0,00100202' Controls : 19 Simple ctrls : 11 Card1.Amixer.info: Card hw:1 'NVidia'/'HDA NVidia at 0xf7080000 irq 17' Mixer name : 'Nvidia GPU 16 HDMI/DP' Components : 'HDA:10de0016,10de0101,00100100' Controls : 24 Simple ctrls : 4 Date: Mon May 28 14:59:21 2012 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) PackageArchitecture: all ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash 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: Only some of outputs are working Title: [700G7C, Realtek ALC269VC, Speaker, Internal] Playback problem UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/14/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P02AAB.078.120314.DK dmi.board.asset.tag: No Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: SEC_SW_REVISION_1234567890ABCD dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP02AAB.078.120314.DK:bd03/14/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700G7C:pvrP02AAB:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrSEC_SW_REVISION_1234567890ABCD:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A: dmi.product.name: 700G7C dmi.product.version: P02AAB dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1005637/+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