Curtis L. Olson writes:

 > If you are running low on video ram, enlarging the window can kill
 > your performance (due to needing to reallocate and shuffle ram.)  You
 > can try starting with the window maximized and see if that works.

There's also a problem with the NVIDIA drivers on some systems, just
generally.  For example, if I start with a very small window (say,
320x240x16) and shrink it by a few pixels, that's it for hardware
rendering -- we're down to a frame every 30 seconds or so; on the
other hand, I can start at 1600x1200x160 and get about 18 fps.  I've
had that problem for a year and a half, ever since I started using a
notebook with a Geforce2Go.

I don't have the problem with other 3D programs like the plib demos,
only with FlightGear.  We must be enabling something that triggers the
driver or hardware bug.


All the best,


David

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