Ubuntu 14.04 crashes with error path usr/bin/Xorg regularly

[cdoebbler]

On my i7 2.80 GH, 8 GB RAM HP desktop tower, Ubuntu 14.04 has crashed regularly, roughly every 10 minutes, and on reboot gives several different executable paths starting with Xorg (ie usr7bin/Xorg). This has happened when I am running in LibreOffice 4.2.1 or even About Me. Running Ubuntu 14.04.1 LTS, Release 14.04.

It happened several ties while running LibreOfffice, so here is that programme's info:

LibreOffice
Candidate: 1:4.2.4-0ubuntu2
  Version table:
     1:4.2.4-0ubuntu2 0
        500 http://ch.archive.ubuntu.com/ubuntu/ trusty-updates/universe amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ trusty-security/universe amd64 Packages
     1:4.2.3~rc3-0ubuntu2 0
        500 http://ch.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages

I expected the system not to crash. It crashed...repeatedly...six time until now in last hour.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.