Public bug reported:

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)

** Affects: linux-hwe (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 apport-bug xenial

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  system sporadically freezes and forces restart

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