Comment # 7 on bug 854364 from Egbert Eich

(In reply to Axel Keller from comment #6)
> Meanwhile I have figured out one reason for this problem!
> 
> It depends on the AUTOMATIC LOGIN that can be set for exactly one user. This
> can be done already during system installation. If done so you will find
> following in the /etc/sysconfig-Editor (YaST2): 
> 
>      Desktop ��� Display Manager ��� DISPLAYMANAGER_AUTOLOGIN:   <username>
> 
> A login with this username causes the VNC window to crash. If you remove
> this username in /etc/sysconfig VNC works fine with this user-login!
> 
> As a consequence of this removal there is no automatic login and you will be
> asked to login every time starting a session after boot. The same happens if
> you add a further user to the system. Then any autologin-user will be
> removed.
> 
> Since there is no autologin for root possible vnc for a root session still
> works without problems.

Axel, thanks for figuring this out!

> 
> So I assume VNC has to disregard any auto-login settings opening a KDE
> session.
> 

VNC has no knowledge of autologin. This is a feature of the DM.
Michal has already asked what DM you are using. You haven't answered this yet,
but since you are talking about KDE I assume you are using the KDE one.

Please still look at /etc/sysconfig/displaymanager and search for A line
starting with 'DISPLAYMANAGER='. We need what's after the '=' sign.

> KDE problem:
> For a user you can set an Auto-Login with application ���Configure Desktop���:
> 
>      ��� System Administration ��� Login Screen: Convenience
> 
> But this doesn't work because no entry will be created in /etc/sysconfig!