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This is a tough problem to summarise in one line! Steps to re-produce:

  1. From Ubuntu Unity desktop (I've experienced this is 11.10 and 12.04), start an NX session with a remote server
  2. [do something in remote session (full screen)]
  3. In remote session, minimise the window (I do this by clicking in top-right corner/hotspot)
  4. [do something in local desktop for a bit], note grey '?' window icon for NX session in Unity task panel
  5. Try to go back to remote session (goto 2). If you can't click remote session's icon in task panel, try ALT+TAB

Now, on some occasions it will be no problem (seems that it always works first time, but not subsequently), and the window of the remote session will spring back into life. On other occasions there is only a tiny grey rectangle about 5 x 20 pixels that appears but doesn't allow me to re-activate the NX window. If this happens I need to go back to the menu and go through the steps to start a new session (thankfully however once it connects I am returned to the existing session).

Here is a screenshot showing the grey rectangle, and you can also see the grey '?' icon in the task panel, with a pop-up title of 'HUD'.

http://i.stack.imgur.com/8Y5XY.jpg

Update: I've now installed gnome-shell, and I get the same problem with that. First switch works well, but second one fails and I get the little grey rectangle.

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1 Answer 1

up vote 0 down vote accepted

After the NX session has minimised you can get it back by exiting it. Find it's icon and quit. This causes the NX session to become full screen again but brings up the terminate / suspend / canel dialog inside the session.

This is a work around, not a fix, but it does allow you to continue with the same NX session.

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Thanks DiQ, that's enough to sort me out. Do you know of any bug report associated with this? Either with Ubuntu or with NoMachine? –  a different ben May 20 '12 at 2:42
    
Sorry no but I doubt that NoMachine will be doing much about it now they have v4 on the way. Perhaps freenx or x2go would be better places to bring it up. If you do report a bug could you post here so I can follow ? Thanks –  DiQ May 22 '12 at 22:46

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