Xorg crashed with SIGABRT in OsAbort()

[Clon]

I can't log in to Lubuntu enviroment. When i try to log in si showed massage: "Starting version 219
[ OK ] Started Light Display Manager." and the loging screen si showed again.

 In past booting up is slow but i was able to log in. https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1432681

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: xserver-xorg-core 2:1.17.1-0ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic i686
ApportVersion: 2.16.2-0ubuntu3
Architecture: i386
CrashCounter: 1
Date: Tue Mar 17 18:25:28 2015
ExecutablePath: /usr/bin/Xorg
InstallationDate: Installed on 2013-03-16 (731 days ago)
InstallationMedia: Lubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.1)
ProcCmdline: /usr/bin/X -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
ProcEnviron:

Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 OsAbort ()
 ?? ()
 FatalError ()
 ?? ()
 ?? ()
Title: Xorg crashed with SIGABRT in OsAbort()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1339832, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.