ubuntu suddently crash (stuck and nothing work) without reason

[Sopa]

it crash many time after using for less than 1h

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: evince 3.28.2-1
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 13 10:52:26 2018
InstallationDate: Installed on 2018-04-12 (0 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180409)
SourcePackage: evince
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and help make Ubuntu better. Unfortunately, we cannot work on this bug because your description didn't include enough information. You may find it helpful to read 'How to report bugs effectively' http://www.chiark.greenend.org.uk/~sgtatham/bugs.html. We'd be grateful if you would then provide a more complete description of the problem.

We have instructions on debugging some types of problems at http://wiki.ubuntu.com/DebuggingProcedures.

At a minimum, we need:
1. The specific steps or actions you took that caused you to encounter the problem.
2. The behavior you expected.
3. The behavior you actually encountered (in as much detail as possible).

Thanks!

[Sebastien Bacher (seb128)]

you reported the issue against the pdf viewer, does the problem has to do with this software?

[Launchpad Janitor (janitor)]

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