OpenGL application performance and "ghost" windows remaining

[Daniel Humphreys <dan_humphreys at yahoo dot co dot uk>]

Hi,

I have installed the latest version of Cygin X server 
(1.13.3) and trying to run a 3D OpenGL based application via ssh (PuTTY)
 and X11 port forwarding.  My host machine is Windows Vista 32 bit and 
am running a Lubuntu 12.10 guest VM using Virtualbox.  I've started the 
XWin server, connected to the VM using SSH and opened an xterm, set 
LIBGL_ALWAYS_INDIRECT=1.  Running "glxinfo | 
grep OpenGL" tells me that I am picking up my graphics card and glxgears
 also appears to give me good performance (~2kfps) so believe WGL to be 
working ok.

When I try to start my OpenGL application from the 
xterm and work through a typical use case, I appear to be getting 
"ghost" windows left behind from windows/message boxes that appear as I 
work through my example.  These also appear when I left 
click the left mouse and I can't find a way of getting rid of them.  
Also the performance generally seems to be a bit temperamental and 
"flickery" between what should be displayed and these "leftover" windows
 depending on where I click on the screen.

Have I included sufficient information?  I have a couple of jpegs I could upload if this helps.

I'm thinking it could be an issue related to the second of the known issues here:

http://x.cygwin.com/docs/ug/using-aiglx.html

What can I do to improve the performance of my application?

Many thanks!

P.S. Incidentally I know that my application works without any problems in the latest version of Xming (7.5.0.64)
 but would like to try get Cygwin/X up and running to the same performance if possible.

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