[quote=Graf Zahl]The GF4 MX is a very, very weak card and doesn't even support all the features GZDoom needs to run properly.[/quote]
I've made the effort to research user reports but have only really found out that people had trouble using opengl 1.2 on relatively late builds. I'm predicting that 1.2 was never supported?
Quoted text in more context here: https://www.doomworld.com/forum/topic/42174-opengl-zdoom/?do=findComment&comment=705247