Problem: I have a VPS on linode that installed ubuntu 14.04. In the Real VNC viewer on my local machine, I see a screen like this. The problem is, although I can navigate the file system in this window, my mouse pointer is a big X and I can't use it to drag the "places" window. I think there should be a "application/places" window on top-left of the viewer window, but it seems being blocked by the unmovable "places" window.
A little background: I was trying to setup a desktop view from my local computer, but I have very limited knowledge about linux and stuff so I just follow the guide in linode's documentation to setup Real VNC viewer on my local machine. Yesterday I was able to get everything work fine, I was able to see the top-left menu containing "applications" and "places", and I was able to use mouse pointer to drag the "places" window around. But Today for some unknown reason when I click "places->computer" I got an eror message saying sth. like "can't open, operation not supported", I couldn't solve it so I reinstalled ubuntu and start everything over. This time I was also able to get Real VNC viewer running on my computer, but I encounter this "place window not movable" situation as I stated above.
What could possibly be the cause of the problem?