Ubuntu 14.04 crashes after a period of keyboard inactivity

[James Edmunds]

After the update to kernel Linux 3.13.0-149 generic Ubuntu 14.4 crashes after a period of keyboard inactivity . The period is about 1 hour .The crash takes one to a terminal type screen which gives some kernel panic information . At this point the PC has to be physically switched off and restarted. Ubuntu 14.4 crashes on all subsequent Kernel updates upto and including 3.13.0-168 .
I now think the crash is connected with the power setting on the PC - 'Power .Suspend when inactive for : nn minutes/hours '.
On 3.13.0-168 when the power setting are ' do not suspend' Ubuntu does not crash . I have not tested this on earlier kernels.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-168-generic 3.13.0-168.218
ProcVersionSignature: Ubuntu 3.13.0-168.218-generic 3.13.11-ckt39
Uname: Linux 3.13.0-168-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.29
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Apr 3 16:31:18 2019
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-precise-amd64-20130203-1
InstallationDate: Installed on 2016-02-02 (1155 days ago)
InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50
SourcePackage: linux-signed
UpgradeStatus: Upgraded to trusty on 2016-07-08 (998 days ago)

[Po-Hsu Lin (cypressyew)]

Hello James,
is it possible to collect the kernel panic message? (screenshots or etc.)

Thanks

[Po-Hsu Lin (cypressyew)]

Contacted by the bug reporter, this issue is still reproducible:

* OP is running 3.13.0-168 and can reproduce the issue by setting the PC power to Suspend when inactive for : 10 minutes
* When this happens, the system will stop responding and needs to be rebooted
* Tried photographing the screen with my camera , but the text on the photo was blurred.
* syslog does not contain these kernel error message

Note that string "canonical-oem-somerville-precise-amd64-20130203-1" in the bug report, this might be a pre-installed system, we will need the model name and a confirmation from the OP, and preferably a screenshot for the error message.

OP is now afk from this system for a month. So I will just reply to this bug to keep it alive for a while.

[Launchpad Janitor (janitor)]

[Expired for linux-signed (Ubuntu) because there has been no activity for 60 days.]