[ubuntu] Remote xdvi hangs with client running 12.04 3D (but not 2D)

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http://ubuntuforums.org – Working from home, I run 'latex filename' on a remote server, where 'filename.tex' is a file of LaTeX code in which a PostScript file (such as a graph from R) is embedded via the graphics package. I then do 'xdvi filename', and a window comes up on the client display. When running Ubuntu 10.04 formerly, and Ubuntu 12.04 2D currently (on the same client, connecting to the same server), the display is immediate. When running Ubuntu 12.04 3D (Unity), the page containing the PostScript image will often 'hang', i.e., it will be only partially drawn, and stay that way for as much as a minute or (Hardware)