Samsung R580 i5-480M stuck at [PCI Configuration begin]

[csjjpm]

Hi,
I tried a normal iBoot and swap discs but it hung on the grey screen with the Apple logo so I searched through the forums and tried these:
-v pcirotuid=0
-v pcirootuid=1
-v npci=0x2000
-v npci=0x3000
-x -v GraphicsEnabler=NO
-x -v GraphicsEnabler=NO PCIRootUID=1
(all as lower and mixed case)

But it hangs on [ PCI configuration begin ]

I have also seen a lot of happy Samsung R580 users with working 10.6.8 and 10.7

I have a 4GB RAM, 640GB hdd Samsung R580 i5-480M NP-R580-JT04UK with ATi Radeon HD 5470 graphics.

Could anyone please advise what switches I need to put in iBoot to install Snow Leopard properly.

 

[r580]

first i have different Processor core i5 520 m.
try this
Open up bios.
1. Set your BIOS to ACHI mode(change from DOS to OTHER and from auto to enable )
2. Set Boot Priority to boot from CD-ROM first
3. Save settings
4-use iboot legecy (or iboot support ) + retail DVD (or restore retail DVD to flash disk) and boot option
busratio=17 or busratio=18 or cpus=1 busratio=18 or cpus=1 busratio=17
for me busratio=18 work fine
5- show this link http://www.tonymacx86.com/viewtopic.php?f=34&t=4609
tell me if you success or you need more help

 

[csjjpm]

Unfortunately none of those options worked for me. Stuck at the same place every time.

 

[csjjpm]

I've decided to go straight for a Lion install using Tony's Unibeast guide. I have a bootable USB with Lion on it. Using "PCIRootUID=0 cpus=1 busratio=17" has got me past [ PCI configuration begin ] but I have a blank screen now doing nothing so I'll have to try a couple of other switches as well.