Acro_Design, on Oct 22 2011, 07:27 AM, said:
i have not attempted this build in a while this was 6 months ago, if this particular gpu has been sorted i will go on and attempt this one again
Have you tried putting your device ID in the controller?
Open Terminal and type the following command: sudo nano /System/Library/Extensions/ATI5400Controller.kext/Contents/Info.plist. You will enter a simple text editor; scroll with the arrow keys to a section where it says IOPCIMatch. Underneath you will find an entry with numbers preceded by 0x; before the other numbers, you will type 0x[devid][venid], or in your case (I believe), 0x68f91002. Once you are done, press Control-O to save and reboot in verbose by typing -v at the boot prompt to check for errors. Don't fret if it doesn't change; if it doesn't work, do this.
Download OSx86 Tools. Upon download, open it and click the button EFI String/Boot Flag. In the new window, click GFX strings. Click the pop-up menu and choose Custom GeForce. Follow the prompt for the name of your card, (you would type ATi Radeon HD 5470) and choose your ports (which, if I am not mistaken, is VGA / DVI). Once you're done, copy the entire hexadecimal EFI string. Now open Terminal again and type this: sudo nano /Extra/com.apple.boot.plist. Scroll down and press return to create a new line after the 5 under Timeout. Press tab and type <key>device-properties</key>. Press return again and type <string> and paste the EFI string there. At the end type </string>, save and reboot. See if graphics work then.
If you are not concerned about 3D acceleration (QE/CI), but only want a different resolution, download #########, install the bootloader, and edit your com.apple.boot.plist file as follows: type sudo nano /Extra/com.apple.boot.plist and scroll down to Kernel Flags. In the line below it, type at the end "Graphics Mode"=yourxresolutionx32. For example, if you wanted 1280x1024, you would type "Graphics Mode"=1280x1024x32.
Let us know how it goes.

I have another bootloader I can link if you want.