Bug#664737: [kscreensaver] kscreensaver does not lock screen when returning from parallel session

[Meinert <meinert@gmx.at>]

Package: kscreensaver
Version: 4:4.7.4-2
Severity: important

--- Please enter the report below this line. ---

Kscreensaver lock behaviour is inconsistent. When starting a new paralell KDE 
session from within KDE and switching back to the original one the screen is 
locked. In case you leave the new session, you return to the original one 
unlocked.

How to reproduce this:
1) Start "New Session" from within KDE
2) Approve the dialog which notifies, how to switch sessions and
    **that your session will be locked**.
3) [Ctrl][Alt][F7]: Switch back to the original settion
*) The original session gets locked
4) Unlock the original session.
5) [Ctrl][Alt][F8]: Switch to the new session
6) Log in (I've used a guest account and LXDE session)
7) Log out from session
*) The original session will appear, but it is not locked.


--- System information. ---
Architecture: amd64
Kernel:       Linux 3.2.0-2-amd64

Debian Release: wheezy/sid
  990 testing         security.debian.org 
  990 testing         ftp.rfc822.org 
  800 unstable        ftp.rfc822.org 
  690 testing         www.debian-multimedia.org 
  500 testing         deb.opera.com 
    1 experimental    ftp.rfc822.org 

--- Package information. ---
Depends                        (Version) | Installed
========================================-+-===================
kde-runtime                              | 4:4.7.4-2
libc6                           (>= 2.4) | 2.13-27
libgl1-mesa-glx                          | 7.11.2-1
 OR libgl1                               | 
libglu1-mesa                             | 7.11.2-1
 OR libglu1                              | 
libkdecore5              (>= 4:4.4.4-2~) | 4:4.7.4-4
libkdeui5                   (>= 4:4.3.4) | 4:4.7.4-4
libkexiv2-10                (>= 4:4.7.1) | 4:4.7.4-2
libkio5                     (>= 4:4.3.4) | 4:4.7.4-4
libkparts4                  (>= 4:4.3.4) | 4:4.7.4-4
libkscreensaver5            (>= 4:4.6.1) | 4:4.7.4-2
libqt4-opengl               (>= 4:4.5.3) | 4:4.7.4-2
libqtcore4            (>= 4:4.7.0~beta1) | 4:4.7.4-2
libqtgui4                   (>= 4:4.5.3) | 4:4.7.4-2
libstdc++6                    (>= 4.1.1) | 4.6.3-1
libx11-6                                 | 2:1.4.4-4
kde-workspace-bin                        | 4:4.7.4-2


Recommends                   (Version) | Installed
======================================-+-==============
kde-window-manager                     | 4:4.7.4-2
kscreensaver-xsavers     (= 4:4.7.4-2) | 


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