Serrie, the next step is to fully reverse commit bisect from kernel 4.2 to 4.6-rc6 in order to identify the last bad commit, followed immediately by the first good one. Once this good commit has been identified, it may be reviewed for backporting. Could you please do this following https://wiki.ubuntu.com/Kernel/KernelBisection#How_do_I_reverse_bisect_the_upstream_kernel.3F ?
Please note, finding adjacent kernel versions is not fully commit bisecting. After the fix commit (not kernel version) has been identified, then please mark this report Status Confirmed. Thank you for your understanding. Helpful bug reporting tips: https://wiki.ubuntu.com/ReportingBugs ** Tags added: needs-reverse-bisect ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1574612 Title: Random hangs Status in linux package in Ubuntu: Incomplete Bug description: System hangs randomly. This mostly occurs anywhere between 15 minutes and a few hours after boot. Couldn't figure out the trigger. Happened while viewing YouTube, using Spotify switching to Eclipse etc. SSH still works, so I can get to the machine if the lockup occurs. That's how I submitted the bug. All screens freeze though, while audio keeps on working (like music from Spotify or sound from a YouTube video). The only thing that seems to keep working UI-wise is the mouse pointer. Had memtest running for half an hour without problems. The issue occurs multiple times a day. Issue doesn't seem to be triggered if I remove linux-image-4.2.0-35-generic and go back to linux-image-4.2.0-16-generic. Did use the linux-image-4.2.0-16-generic kernel for a few days without issues. The kern.log contains some stacktraces with the method being 'schedule'. This is around the time the hang occurs. See extra debug information for more info. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-35-generic 4.2.0-35.40 ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5 Uname: Linux 4.2.0-35-generic x86_64 ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: serrie 1815 F.... pulseaudio /dev/snd/pcmC0D0c: serrie 1815 F...m pulseaudio /dev/snd/controlC0: serrie 1815 F.... pulseaudio Date: Mon Apr 25 13:56:48 2016 InstallationDate: Installed on 2016-04-12 (13 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) IwConfig: docker0 no wireless extensions. enp4s0 no wireless extensions. lo no wireless extensions. MachineType: System manufacturer System Product Name ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-35-generic root=UUID=c15a8aa0-fb21-495c-bbc6-ea4f2018dc1f ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.2.0-35-generic N/A linux-backports-modules-4.2.0-35-generic N/A linux-firmware 1.149.3 RfKill: SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: Upgraded to wily on 2016-04-22 (3 days ago) dmi.bios.date: 01/27/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0505 dmi.board.asset.tag: Default string dmi.board.name: B150M-A D3 dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0505:bd01/27/2016:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnB150M-AD3:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1574612/+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
