After 10.6.3 update, most of 48xx ATI cards lost the support for a second monitor, or they never had one. below there is a solution for activate multiple monitors. many thanks to mucha, bcc9, dong, crazybirdy
I'm still testing, there are some tweaks to do. I need your feedbacks for
improve the final result.
DVI_DVI (need more tests)
for DVI_HDMI you need another framebuffer (Peregrine). change the boot file with the one posted above. It's based on chameleon rc5 rev752. I have tryed kabyl boot AtiFb option but without success.
I'm also trying to find a way to include HDMI_DVI_DP output in one solution but I need more reports.
enjoy and please give me a response
Well I have been searching around and someone said they had got their dual DVI 4890 working with 6.7 using Netkas Exotic Patch for 6.7 (LINK)...
I tried this and it didn't work for me but I had already installed 6.7 combo update (they said to install before rebooting after combo update).
Maybe this will help you.