lubuntu crash on start

[Clon]

lubuntu start with black screen.

Now I can't log in to Lubuntu enviroment. When i try to log in massage is showede:
"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 2:1.16.2.901-1ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-7.7-generic 3.19.0
Uname: Linux 3.19.0-7-generic i686
ApportVersion: 2.16.2-0ubuntu2
Architecture: i386
Date: Tue Mar 10 12:41:44 2015
ExecutablePath: /usr/bin/Xorg
InstallationDate: Installed on 2013-03-16 (724 days ago)
InstallationMedia: Lubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.1)
ProcCmdline: /usr/bin/X -core :1 -seat seat0 -auth /var/run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch
ProcEnviron:

Signal: 6
SourcePackage: xorg-server
UpgradeStatus: Upgraded to vivid on 2015-02-27 (10 days ago)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 OsAbort () at ../../os/utils.c:1361
 AbortServer () at ../../os/log.c:786
 FatalError (f=0xb768e3d6 "no screens found") at ../../os/log.c:924
 dix_main (argc=11, argv=0xbf844734, envp=0x0) at ../../dix/main.c:205
 main (argc=11, argv=0xbf844734, envp=0xbf844764) at ../../dix/stubmain.c:34

[Launchpad Janitor (janitor)]

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

[Clon (fillip1)]

I don't think these is duplicate of Bug #1424362 which is about Lubuntu software center. These Bug is about inability to log in Lubuntu.

[Clon (fillip1)]

Same bug with:
lsb_release -rd
Description: Ubuntu Wily Werewolf (development branch)
Release: 15.10

[Clon (fillip1)]

I install Xfce and same problem has appeared.

[ԜаӀtеr Ⅼарсһуnѕkі (wxl)]

Is this not the same problem you described in the other bug you recently
made?

[Clon (fillip1)]

I think it is, but these is bit older report.