thunderbird freezes entire system after a few seconds of use

[Joe Liau]

Description: Ubuntu Vivid Vervet (development branch)
Release: 15.04

thunderbird:
  Installed: 1:31.5.0+build1-0ubuntu1
  Candidate: 1:31.5.0+build1-0ubuntu1
  Version table:
 *** 1:31.5.0+build1-0ubuntu1 0
        500 http://mirrors.accretive-networks.net/ubuntu/ vivid/main amd64 Packages
        100 /var/lib/dpkg/status

Opening thunderbird (or firefox apparently) will cause the whole system to freeze after a few seconds. Hard reset is required.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: thunderbird 1:31.5.0+build1-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.16.2-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: black 1959 F.... pulseaudio
 /dev/snd/controlC0: black 1959 F.... pulseaudio
BuildID: 20150223201105
Channel: Unavailable
CurrentDesktop: Unity
Date: Sun Mar 15 22:01:56 2015
EcryptfsInUse: Yes
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IncompatibleExtensions:
 Lightning - {e2fda1a4-762b-4020-b5ad-a41df1933103}
 English (GB) Language Pack - <email address hidden>
 Chinese Simplified (zh-CN) Language Pack - <email address hidden>
 Japanese Language Pack - <email address hidden>
 TT DeepDark - {9ed238c0-af95-11e0-9f1c-0800200c9a66}
InstallationDate: Installed on 2014-04-21 (329 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
IpRoute:
 default via 192.168.1.1 dev eth0 proto static metric 1024
 169.254.0.0/16 dev eth0 scope link metric 1000
 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.100
IwConfig:
 eth0 no wireless extensions.

 eth1 no wireless extensions.

 lo no wireless extensions.
MostRecentCrashID: bp-e206880d-355e-42a3-a2fa-da0e92150302
PrefSources:
 prefs.js
 [Profile]/extensions/{847b3a00-7ab1-11d4-8f02-006008948af5}/defaults/preferences/enigmail.js
 [Profile]/extensions/{e2fda1a4-762b-4020-b5ad-a41df1933103}/defaults/preferences/lightning.js
Profiles: Profile0 (Default) - LastVersion=31.5.0/20150223201105
RelatedPackageVersions:
 google-talkplugin 5.38.5.0-1
 rhythmbox-mozilla 3.1-1ubuntu2
RfKill:

RunningIncompatibleAddons: True
SourcePackage: thunderbird
UpgradeStatus: Upgraded to vivid on 2015-03-16 (0 days ago)
dmi.bios.date: 05/19/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1605
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P6T DELUXE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1605:bd05/19/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP6TDELUXE:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
no_proxy: localhost,127.0.0.0/8,::1

[Launchpad Janitor (janitor)]

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