This solved the issue for me: https://ubuntuforums.org/showthread.php?t=2338349
Basically, what I did was Start alsamixer with this command: alsamixer -c1 And then: 1. Navigate to the Loopback channel rightmost with arrow-key 2. Disable the Channel by pressing the arrow-down-key once 3. Save and quit the alsamixer with ESC Reboot. -- 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/1502155 Title: [20AQ0069GE, Realtek ALC3232, Speaker, Internal] crackling sound while booting Unity-Desktop Status in linux package in Ubuntu: Invalid Bug description: Machine is an T440s. Todays Daily Build of Ubuntu Unity, but was also on Ubuntu 15.10 Beta While booting into Desktop a crackling sound appears (like connect speakers or headphones to a music player if not muted) and it sounds very unhealthy to the speakers. When using Debian Testing I have the issue while booting. With Fedora 23 Beta its also the same while booting. Always this unhealthy sounding crackling noise and then working normal after booting is finished. Muting is working, volume selecting is working without any issues, just while booting to Desktop there seems to be something not working properly while initializing internal speakers. On latest Ubuntu 14.04.3 there is no crackling while booting. Just booting normally into Desktop. You can hear that the speakers are initialized with a very silent plopping sound (as also in Debian Stable) but I think I start observing it just because of this crackling sound before. I was running Ubuntu 14.04.2 plus LTS Enabled Stack before and there were also no such issues. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 4.2.0-12.14-generic 4.2.1 Uname: Linux 4.2.0-12-generic x86_64 ApportVersion: 2.19-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC1D0p: ubuntu 1987 F...m pulseaudio /dev/snd/controlC1: ubuntu 1987 F.... pulseaudio /dev/snd/controlC0: ubuntu 1987 F.... pulseaudio CasperVersion: 1.365 CurrentDesktop: Unity Date: Fri Oct 2 13:32:32 2015 LiveMediaBuild: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20151002) PackageArchitecture: all ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful Symptom_Card: Built-in Audio - HDA Intel PCH Symptom_Jack: Speaker, Internal Symptom_PulsePlaybackTest: PulseAudio playback test successful Symptom_Type: None of the above Title: [20AQ0069GE, Realtek ALC3232, Speaker, Internal] Playback problem UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/22/2015 dmi.bios.vendor: LENOVO dmi.bios.version: GJET84WW (2.34 ) dmi.board.asset.tag: Not Available dmi.board.name: 20AQ0069GE dmi.board.vendor: LENOVO dmi.board.version: 0B98401 PRO dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrGJET84WW(2.34):bd06/22/2015:svnLENOVO:pn20AQ0069GE:pvrThinkPadT440s:rvnLENOVO:rn20AQ0069GE:rvr0B98401PRO:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20AQ0069GE dmi.product.version: ThinkPad T440s dmi.sys.vendor: LENOVO --- ApportVersion: 2.19-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: ubuntu 2025 F.... pulseaudio /dev/snd/controlC0: ubuntu 2025 F.... pulseaudio CasperVersion: 1.365 CurrentDesktop: Unity DistroRelease: Ubuntu 15.10 LiveMediaBuild: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20151002) MachineType: LENOVO 20AQ0069GE Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/username.seed boot=casper quiet splash --- ProcVersionSignature: Ubuntu 4.2.0-12.14-generic 4.2.1 RelatedPackageVersions: linux-restricted-modules-4.2.0-12-generic N/A linux-backports-modules-4.2.0-12-generic N/A linux-firmware 1.148 Tags: wily UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' Uname: Linux 4.2.0-12-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 06/22/2015 dmi.bios.vendor: LENOVO dmi.bios.version: GJET84WW (2.34 ) dmi.board.asset.tag: Not Available dmi.board.name: 20AQ0069GE dmi.board.vendor: LENOVO dmi.board.version: 0B98401 PRO dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrGJET84WW(2.34):bd06/22/2015:svnLENOVO:pn20AQ0069GE:pvrThinkPadT440s:rvnLENOVO:rn20AQ0069GE:rvr0B98401PRO:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20AQ0069GE dmi.product.version: ThinkPad T440s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1502155/+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
