can't catch mouse movement using gtk and gtkgl

I have previously written about my application, in which despite requesting all events, I am not seeing mouse wheel or mouse motion events. In desperation, I have stripped all my code out, and have a bare framework that uses the gtkglarea widget, leaving it blank. If some kind GTK+ expert would

building OpenGL under GTK+ using gtkgl

I have a framework that is working well under GTK+, but there are a number of problems. Most critical, I need to know how to continuously busy-wait and force redrawing. I am currently using gtk_main() which sleeps and refreshes only when the screen is resized. Instead I assume I should do somet