Hey Teck, checkout the message :
“OpenGL not working with TNT2 M64” posted October 22.
I had exactly the same problem as you.
My setup is : Riva TNT2 Ultra 32M, VIA chipset, 128M 133Mhz DRAM, PIII600e, Win98SE, DirectX7.0a, latest GLsetup drv.
I suddenly lost OpenGL ability in Descent 3 and Half-Life.
Also my demo of Star Trek Voyager Elite Force would not run at all with an OpenGL error msg. Now they work fine.
I was about to reformat + reinstall Win98 and everything until I read this message.
The “;DVA=0” edit in Win.ini was the fix!
See the message…
Good Luck !!