Sb, the next step is to fully commit bisect from kernel 3.19 to 4.2 in order to identify the last good kernel commit, followed immediately by the first bad one. This will allow for a more expedited analysis of the root cause of your issue. Could you please do this following https://wiki.ubuntu.com/Kernel/KernelBisection ?
Please note, finding adjacent kernel versions is not fully commit bisecting. Thank you for your understanding. Helpful bug reporting tips: https://wiki.ubuntu.com/ReportingBugs -- 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/1497675 Title: [15.10 Regression] LightDM unity-greeter login sound has noisy distortion after 15.10 Wily upgrade Status in linux package in Ubuntu: Incomplete Bug description: Hi, I just upgraded from Ubuntu 15.04 to 15.10 beta. Now when the LightDM unity-greeter screen appears, it produces a loud distortion noise where the Ubuntu drums should sound. It was working fine in 15.04 and all prior versions. Apart from this sound works fine after logging into Ubuntu. --- ApportVersion: 2.18.1-0ubuntu1 Architecture: i386 CurrentDesktop: Unity DistroRelease: Ubuntu 15.10 InstallationDate: Installed on 2015-07-26 (56 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release i386 (20150422) Package: unity-greeter 15.10.1-0ubuntu1 PackageArchitecture: i386 ProcVersionSignature: Ubuntu 4.2.0-10.12-generic 4.2.0 Tags: wily Uname: Linux 4.2.0-10-generic i686 UpgradeStatus: Upgraded to wily on 2015-09-20 (1 days ago) UserGroups: adm lpadmin sambashare sudo _MarkForUpload: True --- ApportVersion: 2.18.1-0ubuntu1 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: miriam 1808 F.... pulseaudio /dev/snd/controlC1: miriam 1808 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 15.10 HibernationDevice: RESUME=UUID=cc55c385-01f9-45f4-b217-66627c7455be InstallationDate: Installed on 2015-07-26 (56 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release i386 (20150422) MachineType: LENOVO 20AR006RUS Package: unity-greeter 15.10.1-0ubuntu1 PackageArchitecture: i386 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-10-generic root=UUID=6e3af67c-126e-4f64-8004-8e87ef62201c ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.2.0-10.12-generic 4.2.0 RelatedPackageVersions: linux-restricted-modules-4.2.0-10-generic N/A linux-backports-modules-4.2.0-10-generic N/A linux-firmware 1.148 Tags: wily wily UdevLog: Error: [Errno 2] No existe el archivo o el directorio: '/var/log/udev' Uname: Linux 4.2.0-10-generic i686 UpgradeStatus: Upgraded to wily on 2015-09-20 (1 days ago) UserGroups: adm lpadmin 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: 20AR006RUS dmi.board.vendor: LENOVO dmi.board.version: SDK0E50510 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:pn20AR006RUS:pvrThinkPadT440s:rvnLENOVO:rn20AR006RUS:rvrSDK0E50510PRO:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20AR006RUS 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/1497675/+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