Seems like it should be simple, I assumed just a key combination or some icon I could drop on the desktop. I am accessing a ubuntu 14 machine, which is a TightVNC server using a Windows 7 TightVNC client. No connection problems. But I see no way to kill the session, so I have to ^-alt-del to get my Windows Task Manager and kill the VNC program. Surely there is a simple way to disconnect from within the session. The desktop is Windows 7-64. Both machines are within my LAN.