I have two builds (Server and Client 10.6.1). Both were built with a gtx260 which always gave a display even when strings were incorrect or whatever.
I have put a 9800GT in there as a permanent card.
Get boot screen - Grey Apple in a decent resolution all looks good.
Then screen goes black and stays black. Put both builds onto my laptop (via usb caddy) and removed the EFI string for gtx260 - Tried it with just graphic enabled = Yes.
then tried putting the original plist file I had which had a generic screen res with no specifics to card.
finally I booted up on the laptop into the OS - ran EFI studio and put in the 9800GT 1024mb (mine is a 512mb but thought it should still work for resolution).
No difference. Both builds I cannot get booted up past the balck screen.
So whats the normal procedure to diagnose and hopefully fix this. I have found a hex string for a 9800 512mb
Tried that no difference. also note that once I get black screen fans drop down a bit but all still run. Disk is still doing something.
Ran ARD and VNC - they can see the mac but it is in unknown state and cannot connect. I'll run the installer again and put the DS4 DSDT over to it see if that helps but any ideas really welcome.
I had worked on my last build for a while to get it running really well. All I need is to get the card swapped to this 9800 .