I have Gigabyte P35-DS3R with E6750 and Powercolor X1950 Pro 256Mb PCI-E (1 DVI -1 VGA) I installed JaS 10.4.8 for AMD and Intel and the installation went successful, but in the first booting screen the gray apple appeared first then a light blue screen then the PC freezed, and every time I start it this happens, the VGA is the problem i am sure.. but some people says it works with them... what I have to do please? and in steps coz I cant log in to do any thing !! where will I add patch or something and how !!!
I really appreciate any help and I will post my case completley for newbies.

When booting tap F8 repeatedly. A black screen should come up allowing you to add boot flags. Type -v [verbose mode] and hit enter. Post your output, possibly as a screenshot. Sometimes just using the -v flag allows you to boot.
Did you select the ATI drivers during install? I don't remember what drivers are available on that specific install, but i thought some X1000 were on there...
Nice rig, check specs in my sig, similar to yours [but your sig is not up-to-date, jftr ], hehe... Still sorting out graphics card at the moment, have artifacts under all OSes :S 2nd card i have that problem with, so i don't think it's actually the graphics card... oh well, i'll figure it out some day

Thanks buddy I am at work now when I back home I'll give it a try and see, by the way I choosed the ATI drivers while installing but there were no X1000 in it.

I have done exactly what you said, I clicked F8 and -V and it kept doing some stuff I captured it here :


Click to view attachment

Click to view attachment

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And the final screen the PC freezed was

Click to view attachment


by the way I tried to reinstall it and choosed only the drivers like Ati X1x00 and x1000 .. and the result was the same.

It appears to me that its your hardrive... or hard drive controller

Yep, i agree, tho i doubt it's the hard drive controller as i have the same motherboard... I'd recommend searching the forums for "IOATAController device blocking bus", there seem to be at least a few people who've encountered this.
A 'solution' is posted here, tho i don't really understand what the person means/did :S Hope you figure it out If not, you could always try sending a message to the author of the post... I guess he's really saying this.
Another relevant thread here and here.
Hope you find a solution to your problem I don't really think your graphics card is preventing you from booting...