I have a Voodoo3 2000 PCI and a Rage II+ (Mach 64) PCI. The Voodoo is the
primary video card. I had dual-head working once, I think with X 4.0.1 with
these two cards. I upgraded to Redhat 7.1 and the dual-head setup locks up.
The 3dfx card initializes, then the ATI card (I can see the spinning ATI bios
LOGO) and then the whole computer locks solid - only the reset button works.
I tried using XFree86 -configure; it sets up a dual head config in 1(yes one)
bpp, 640x480 (The second monitor is really old, so no pnp). However, not even
this configuration works.
Strange thing is that if I try it enough times, it sometimes works. It makes me
think that there is a race condition in the code that I keep losing.
Anyway, I tried upgrading the kernel drm drivers, but that didn't help. I tried
upgrading XFree86 to 4.1.0, but that didn't help either. I tried disabling DRI
but that didn't work either. I tried different video modes, no joy. I tried
relative and absolute positioning of the two screens, no success there either.
However, if I use just ONE head, regardless of which it is, it works fine. Same
XF86Config file, except I change the screen id in the server layout section. So
it's only when the two cards are used together that it locks up (right after I
see the ugly default X background and the X cursor on the primary (3dfx)
Anyone have any ideas?
PS if possible, please CC my email..