Was'nt there a Tool or a workaround to reset the VoodooCard?

can't remember But i've got something in my mind

IMHO, there is the old Voodoo1 glide2x.ovl somewhere in the %patch%.
Or you forgot to delete glide2x.ovl in the game directory (some DOS glide games install local version of glide2x.ovl (from Voodoo1/Rush)).
What games have you tested?

This might not be related but I had issues with Matrox cards and V2. If I would access the Voodoo control panel the machine would basically hang.

But your issue sounds different. There is a thread "search for Voodoo 2 compatibility matrix" that shows how to get many games going with a V2.

#1 If the issue is related to the G400 I would try a different 2D card as a test to eliminate that theory (although I've had good luck with the G400).
#2 If you have another variety of voodoo2 to try?

Some games (and cards) require varying drivers.... for my voodoo2 stuff I found there isn't a single driver that works with all of my games. *sigh*

For the worst case scenario-- I would advise to create a batch script that can replace the system glide DLLs with any variant that is required for a specific game. I've been meaning to do that but haven't gotten around to it yet.

well, problem was cpu/pci clk ratio.
my fsb speed is set to 8x100=800mhz, that doesnt work.
voodoo cards work if i set to 8x66, 8x75, 8x83, that way cpu/pci ratio is 2:1, any different setting is 3:1 and voodoo doesnt work.
trying to get workaround, maybe some bios tweak any ideas? until then will have to settle CPU with 8x83.

You were overclocking? Please tell us something like that in the beginning...

Voodoo1 hates high frontside bus and high cpu clocks.

I have a few and none would run normally on a Tualatin 1400, not even at half the speed (10,5 x 66mhz). They all work fine in slower systems and are different brands.

Voodoo2 never had a problem in any system. I don`t overclock my retro stuff.

overclock is not the problem, like i said its cpu pci ratio. it has to be 2:1 or else wont work in my system. I read that someone else had same problem and cpu was not overclocked, then he chaned mobo and it worked fine at same cpu speed.
also had voodoo1 and work perfectly fine though.
also,tried cards in other pc(P4 3.2ghz, asus P4c mobo, 1gb ram, win98se) system was not overclocked, same problems. would help if downclocked, didnt bother.

Ok, thanks for sharing. Even at 2:1 my voodoo1 cards (and rush) wouldn`t work in my asus tusl2-c.
Voodoo2, Voodoo3 pci and voodoo5 pci worked fine. In every other retro box (slower) all cards work so i guess some combinations of chipsets, fsb and cpu speed can conflict with v1 and v2?

My banshee also didn`t work in this board and it is an agp card. In an Asus p3b-f it has no problems at all.... In Tusl2-c V1 gave lots of corruption (5 different cards!) and Banshee and rush didn`t display anything.

I will try again soon with a different p3 cpu and see how that goes...

according to this guy, voodoo1 has issues on boards after BX chipset.
http://www.3dfxzone.it/enboard/topic.asp?TOPIC_ID=15900