When a ROOT TCanvas is quit with a .q it always kills the XVnc server.
Steps to Reproduce:
- Start a Tiger VNC server on lxplus7.cern.ch and connect to it from a client
- Run ROOT
- root> TCanvas a
- root> .q
After this the VNC server is killed.
If using normal over normal ssh X11 forwarding then things are okay.
The same behavior occurs when opening any other GUI elements, like TBrowser etc.