I get the dim grey/green console effect (framebuffer console) and also some intermittent font corruption problems in most X programs.
I'm using ThinkPad 600X which has the NeoMagic MagicMedia256ZX [nm2360 chip] using the 'neomagic' driver. Both problems went away when I changed the colour depth from 24bpp to 16bpp. Might be worth a try ? Regards, Paul