The patch attached fixed the problem on my XPS13 9333. I don't know which is the preferred way to fix the issue, but the problem is caused by AA-loopback. (Based on http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d2e92709e88d97c001b6bb96054ecb06d99d0dc6)
When the audio card goes from D0 to D3 and vice versa there's still the annoying pop noise and while in D3, there's some background noise, most likely caused by other components (I can for example hear the well known electrical noise of the XPS13 9333 owner, even if it's not that loud). However, as long as the audio card is in D0, there are no noises. ** Patch added: "0001-ALSA-hda-Disable-AA-loopback-on-ALC668.patch" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1252733/+attachment/4111379/+files/0001-ALSA-hda-Disable-AA-loopback-on-ALC668.patch -- 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/1252733 Title: [XPS 12-9Q33, Realtek ALC668, Black Headphone Out, Left] Background noise or low volume Status in “alsa-driver” package in Ubuntu: Incomplete Bug description: When listening to sound on my laptop through headphones, there's a constant background hiss (which disappears only when all sound has been stopped for a few seconds. power saving I guess). I also need to turn the volume *way* down to 10% for the sound volume to be reasonable (it's way too loud otherwise). ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: alsa-base 1.0.25+dfsg-0ubuntu4 ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6 Uname: Linux 3.11.0-13-generic x86_64 ApportVersion: 2.12.5-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: martijn 2130 F.... pulseaudio /dev/snd/pcmC1D0p: martijn 2130 F...m pulseaudio /dev/snd/controlC0: martijn 2130 F.... pulseaudio Date: Tue Nov 19 14:26:46 2013 EcryptfsInUse: Yes InstallationDate: Installed on 2013-11-13 (6 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MarkForUpload: True PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful Symptom_Card: Intern geluid - HDA Intel PCH Symptom_Jack: Black Headphone Out, Left Symptom_PulsePlaybackTest: PulseAudio playback test successful Symptom_Type: High background noise, or volume is too low Title: [XPS 12-9Q33, Realtek ALC668, Black Headphone Out, Left] Background noise or low volume UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/24/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A03 dmi.board.name: XPS 12-9Q33 dmi.board.vendor: Dell Inc. dmi.board.version: A03 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA03:bd09/24/2013:svnDellInc.:pnXPS12-9Q33:pvrA03:rvnDellInc.:rnXPS12-9Q33:rvrA03:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: XPS 12-9Q33 dmi.product.version: A03 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1252733/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
