This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- bionic' to 'verification-done-bionic'. If the problem still exists, change the tag 'verification-needed-bionic' to 'verification-failed- bionic'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-bionic -- 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/1845810 Title: [XPS 13 9360, Realtek ALC3246, Black Headphone Out, Front] High noise floor Status in linux package in Ubuntu: Triaged Status in linux source package in Bionic: Fix Committed Bug description: Since linux-image-4.15.0-60-generic 4.15.0-60.67, the background noise in my headphones has increased to unreasonable levels. In linux- image-4.15.0-58-generic 4.15.0-58.64 and previous kernels the noise was present but at a bearable level, which I had always assumed was a hardware design issue. Now, with the increased noise floor, the headphone socket is essentially unusable. This is a regression in a stable release (Bionic). The problem consistently reproduces as follows: OK: linux-image-4.15.0-58-generic 4.15.0-58.64 BAD: linux-image-4.15.0-60-generic 4.15.0-60.67 BAD: linux-image-4.15.0-62-generic 4.15.0-62.69 BAD: linux-image-4.15.0-64-generic 4.15.0-64.73 Steps to reproduce: Hardware: Dell XPS 9360 (shipped with Ubuntu). I'm using a manually reinstalled Ubuntu Bionic, not the OEM installation. Mostly everything is on defaults. 1. Boot with no headphones connected 2. Log in 3. Plug the headphones in Expected: normal noise level Actual: very high noise level. Playback does work correctly but the SnR is terrible. The "Select Audio Device" prompt appears, but the noise problem is present before I make a selection. If I select Headphones or Headset (I'm using a headset) then the noise remains after a brief (~0.5s) interruption. If I select Microphone then the noise goes, but then the audio comes through the speakers and not the headset as required. I have tried messing with alsamixer but haven't found anything to explain or reduce the noise. Switching to a previous kernel fixes the problem immediately with no settings change required. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 4.15.0-64.73-generic 4.15.18 Uname: Linux 4.15.0-64-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: robie 2126 F.... pulseaudio robie 3648 F.... alsamixer CurrentDesktop: ubuntu:GNOME Date: Sat Sep 28 23:51:05 2019 InstallationDate: Installed on 2017-05-11 (870 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170507) 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: Black Headphone Out, Front Symptom_PulsePlaybackTest: PulseAudio playback test successful Symptom_Type: High background noise, or volume is too low Title: [XPS 13 9360, Realtek ALC3246, Black Headphone Out, Front] Background noise or low volume UpgradeStatus: Upgraded to bionic on 2018-07-28 (427 days ago) dmi.bios.date: 03/14/2019 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.11.0 dmi.board.name: 00GCYR dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.11.0:bd03/14/2019:svnDellInc.:pnXPS139360:pvr:rvnDellInc.:rn00GCYR:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.family: XPS dmi.product.name: XPS 13 9360 dmi.sys.vendor: Dell Inc. --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: robie 2329 F.... pulseaudio CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=ae23a431-2f44-4c12-992a-a0da8186bfcc InstallationDate: Installed on 2017-05-11 (871 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170507) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0bda:568b Realtek Semiconductor Corp. Bus 001 Device 002: ID 0cf3:e300 Atheros Communications, Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. XPS 13 9360 Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-64-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-64.73-generic 4.15.18 RelatedPackageVersions: linux-restricted-modules-4.15.0-64-generic N/A linux-backports-modules-4.15.0-64-generic N/A linux-firmware 1.173.9 Tags: bionic Uname: Linux 4.15.0-64-generic x86_64 UpgradeStatus: Upgraded to bionic on 2018-07-28 (428 days ago) UserGroups: adm cdrom dialout dip libvirt lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 03/14/2019 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.11.0 dmi.board.name: 00GCYR dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.11.0:bd03/14/2019:svnDellInc.:pnXPS139360:pvr:rvnDellInc.:rn00GCYR:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.family: XPS dmi.product.name: XPS 13 9360 dmi.sys.vendor: Dell Inc. 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