Freeze on startup

[Kais72]

Hi folks,

I've installed iDeneb (10.5.6) on my computer without problems. But on the firs start the systems hangs on the blue screen (after the grey screen with Apple Logo).

I can start the system in safe mode. After reading some similar topics, I've installed the driver for ATI HD3850 (from this forum)... but nothing's changed.

 

Now I'm not sure about the graphic driver issue, just because the system detects the card. And in safe mode I'm using 1680x1050. Is that possible without the appropiate driver?

 

Any ideas?

 

Thanks

Specifications:

* ASUS M3A79T-Deluxe

* AMD Phenom 9950 (Quad Core)

* ATI HD3850/512Mb Pcie (ASUS)

* 8Gb OCZ (4x2Gb) DDr2 - Gold Edition