system sporadically freezes and forces restart

[Ben Mayne]

Installed Ubuntu 16.04 on lenovo x270 recently. Several times a day, the entire system will crash (usually with chrome open) and restart. I have not seen any messages before or after. The UI is not distorted at all, just frozen for ~5 seconds before it resets.

Full disk encryption and encrypted home directory enabled.

Background apps: Dropbox, Slack

lsb_release -rd
Description: Ubuntu 16.04.3 LTS
Release: 16.04

processor: Intel® Core™ i7-7600U CPU @ 2.80GHz × 4
graphics Intel® HD Graphics 620 (Kabylake GT2)

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.10.0-32-generic 4.10.0-32.36~16.04.1
ProcVersionSignature: Ubuntu 4.10.0-32.36~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-32-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Aug 12 13:05:23 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-08-11 (0 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1710414

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Launchpad Janitor (janitor)]

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