Why the disconnect/terminate/cancel dialog box may pop up with delay with NX 3.5.0
With NX 3.5.0, clicking on the "X" button in the right upper corner of the session window issues a dialog to disconnect or terminate the session.
In a NX setup where the users' home directories are hosted on a NFS server it may occur that when a user wishes to terminate his session there may be a delay of many seconds before the dialog box asking the user to choose disconnect/terminate/cancel comes up.
All known cases have been tracked down to a missing nfslock service. Starting nfslock solved the issue.
Starting from NX version 4, the session is terminated by choosing the logout option from the system menu. To disconnect the session instead, it is enough to close the session window by pressing the 'X' button in the right upper corner of the window. More details are available here: