Bug#784972: Same problem with PPTP VPN connection

[Matthew Foulkes <m.foulkes@blueyonder.co.uk>]

PPTP VPN connections suffer from the same problem.

I have an up-to-date Debian testing system with KDE and XFCE desktops 
installed. PPTP VPN connections created using the network-manager-gnome 
systray icon in XFCE behave in exactly the same way as PPTP connections 
created using the plasma-nm systray icon in KDE: the new connection can 
be seen from both desktops (regardless of which was used to create it) 
but only works in XFCE.

When I connect using the network-manager-gnome applet in XFCE, a VPN 
password dialog appears and everything works fine; when I try to connect 
using the plasma-nm applet in KDE, no password dialog appears, the 
plasma-nm systray applet tells me that it "needs authorisation", and the 
connection fails. Sometimes, if I look very carefully, I think I can see 
a password dialog appear very briefly, but it disappears so fast I 
cannot be sure.

It looks as if plasma-nm has forgotten how to ask for VPN passwords.

Matthew