nvidia 8600gt display mirroring

[lemon]

I have an nvidia 8600gt which works perfectly via EFI strings. Kalyway 10.5.2 on an AMD 64x2 3800, with voodoo kernel, updated to 10.5.6.
I currently have a CRT monitor (dvi->vga adapter) and a beamer (dvi->vga adapter), which work perfectly at the same time in extended desktop mode, but if I try to enable display mirroring, everything goes black. Anyone has any idea?

[nagu]

I have noticed Mirror as "not enabled" when using natit and Mirror as "not supported" when using EFI or the other way in system profiler. can you try them?

Quick question..do you use EFI for 8600GT in 10.5.6.. Does wake and sleep works propely in 10.5.6?..I have the same card...but having issues some issues as posted in this thread
http://www.infinitemac.com/f7/xfx-nividia-8600-gt-512-qe-ci-as-t2340/

Can you share with me graphics Kexts which you are using.

Thanks,
Nagu

[vladrxpx]

can somebody explain what is mirror in the graphics part ?