Ok I have made a little bit more technical Test. I have Sony VAIO - PCG GRT 816 S. With P4 2.8 Ghz 512 Ram . It has Onyx Black Screen (Wonderfull) with the resolution of 1400*1024 and Result is perfect with P5 ..... By the way Processor fun is always working and the computers goes into protection mode after 1-2 hours working because of the heat :(. So Solution is disabling ACPI (Be carefull,you can burn your laptop). For the best result I think I need 2 gig of ram and one refrigerator in my LAPTOP :)