unity-system-compositor is frozen/hung

[Daniel van Vugt]

unity-system-compositor is frozen/hung. It was running XMir just fine. And then I did:
    sudo mir_demo_client_egltriangle
which usually works and did work for a split-second. Then the screen froze.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity-system-compositor 0.0.2+14.04.20140317.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-18.38-generic 3.13.6
Uname: Linux 3.13.0-18-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
Date: Thu Mar 20 14:32:18 2014
ExecutablePath: /usr/sbin/unity-system-compositor
GraphicsCard:
 Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [8086:0412] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:05a4]
InstallationDate: Installed on 2013-12-21 (88 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131221)
ProcEnviron:

SourcePackage: unity-system-compositor
UpgradeStatus: No upgrade log present (probably fresh install)
version.libdrm: libdrm2 2.4.52-1
version.lightdm: lightdm 1.9.12-0ubuntu1
version.mesa: libegl1-mesa-dev 10.1.0-1ubuntu1

[Daniel van Vugt (vanvugt)]

Stack trace

[Launchpad Janitor (janitor)]

[Expired for Mir because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for unity-system-compositor (Ubuntu) because there has been no activity for 60 days.]