Same here on a Dell T1700 that has the same chip Realtek ALC280, sound card HDA Intel PCH on 14.04 64 bit. Tinny and distorted on main rear output jack, perfect on the front headphone jack.
-- 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/1425221 Title: [OptiPlex 9020, Realtek ALC280, Green Line Out, Rear] tinny sound Status in alsa-driver package in Ubuntu: Confirmed Bug description: Sound equalization is normal when using jack in front of computer, but is "tinny" (i.e., low/nonexistent bass and midtones) when using rear output jack with simple two channel headphones. Jack sense is working correctly because the internal speaker cuts out when a cable is plugged into the rear jack (or front jack, for that matter). Note Dell's website says this computer has a Realtek ALC3220, as opposed to the ALC280 which is detected by linux. This is a clean install of 14.04, so I unfortunately I can't boot into Windows to observe its behavior. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: alsa-base 1.0.25+dfsg-0ubuntu4 ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13 Uname: Linux 3.13.0-45-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.7 Architecture: amd64 CurrentDesktop: Unity Date: Tue Feb 24 12:31:49 2015 InstallationDate: Installed on 2015-01-30 (25 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) 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: Green Line Out, Rear Symptom_PulsePlaybackTest: PulseAudio playback test successful Symptom_Type: High background noise, or volume is too low Title: [OptiPlex 9020, Realtek ALC280, Green Line Out, Rear] Background noise or low volume UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/20/2014 dmi.bios.vendor: Dell Inc. dmi.bios.version: A09 dmi.board.name: 06X1TJ dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 6 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA09:bd11/20/2014:svnDellInc.:pnOptiPlex9020:pvr01:rvnDellInc.:rn06X1TJ:rvrA00:cvnDellInc.:ct6:cvr: dmi.product.name: OptiPlex 9020 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1425221/+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
