Public bug reported:

Got this on xubuntu 13.10:
When I logout and login again and start gdmflexiserver (or any other dbus call 
to displaymanager), the screen turns black with the mouse cursor still visible. 
The session is still running since I can terminate it by executing 'blindly' 
the normal logout process.

A fishy side aspect: When i switch to ttyX via ctrl+alt+fX and login,
the username AND password is also written to .bash_history of the user
with the crippled X-session(if he left a shell open with focus). So you
might want consider this as a security issue.

** Affects: lightdm (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1248948

Title:
  lightdm gets confused after multiple login/logouts

Status in “lightdm” package in Ubuntu:
  New

Bug description:
  Got this on xubuntu 13.10:
  When I logout and login again and start gdmflexiserver (or any other dbus 
call to displaymanager), the screen turns black with the mouse cursor still 
visible. The session is still running since I can terminate it by executing 
'blindly' the normal logout process.

  A fishy side aspect: When i switch to ttyX via ctrl+alt+fX and login,
  the username AND password is also written to .bash_history of the user
  with the crippled X-session(if he left a shell open with focus). So
  you might want consider this as a security issue.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1248948/+subscriptions

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