lightdm crashes on resume

[Michał Bykowski]

Lightdm crashed on resume, together with xorg

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: lightdm 1.7.14-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-7.13-generic 3.11.0
Uname: Linux 3.11.0-7-generic i686
ApportVersion: 2.12.1-0ubuntu3
Architecture: i386
CrashCounter: 1
Date: Sat Sep 14 00:27:14 2013
ExecutablePath: /usr/sbin/lightdm
InstallationDate: Installed on 2013-09-10 (3 days ago)
InstallationMedia: Lubuntu 13.10 "Saucy Salamander" - Alpha i386 (20130909)
LightdmConfig:
 [SeatDefaults]
 greeter-session=lightdm-gtk-greeter
 user-session=Lubuntu
MarkForUpload: True
ProcCmdline: lightdm
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
SegvAnalysis: Skipped: missing required field "Disassembly"
Signal: 11
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 quit_timeout_cb (process=0xb5e033a0) at process.c:254
 ?? ()
 ?? ()