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Message #176523
[Bug 1574612] Re: Random hangs
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
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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
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References