Pac can't lauch tigerVNC correctly. Seems like PAC is passing to tigerVNC wrong or missplaced parameters.
Terminal window show vncviewer help output.
Platfortm > ubuntu 12.04
Both tigerVNC and PAC from SF depots in .deb dist.
David Torrejón Vaquerizas
Yes, I know.. TigerVNC for Debian based distros does not support certain options it does for RedHat based distros... :(
Please, remove TigerVNC and use xtightvncviewer (or use the "Manual" user authentication option)