[GtkGLExt] gears stop rotating

[Mitchell Laks <mlaks verizon net>]

Hi,

If I compile and run the gtkglextmm  demo  program
"gears" on my debian box, 
then after a few hours the gears stop rotating (sometimes takes many hours, 
but eventually this  happend-
the screen no longer updates of the rotating  of the gears and they appear 
"frozen"

while the controlling console still "updates" with the supposed high value for 
rotations/sec. Moreover the numbers displayed continue to change if you 
change the size of the screen or cover the  non-rotating gears. Odd.

On the other hand I had the same behavior with the famous standard X 
application
glxgears.

what causes this behavior?

I am curious...

Thanks,

Mitchell