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wont boot normaly

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hi there my laptop is a hp probook 6550b.

i've instaled mavericks from the pen drive. after instalation i had the grey screen, i managed to fix that but after i restarted the computer the only way i could boot was either using boot without ceches, safe mode or by using cpus=1. but not normaly or with ACPI=off. im very new to this type of thing if anyone could help that would be awesome :D 

also i cant get the wifi or camera to work, im not that fussed about the camera but the wifi would be realy usefull as i only have 2 working usb ports and having one taken up by a usb wifi dongle would be annoying.

specs can be found here http://www.cnet.com/products/hp-probook-6550b-15-6-core-i5-450m-windows-7-pro-4-gb-ram-320-gb-hdd-series/specs/ i tryed to copy and past but it was a mess sorry.

Intel Core i5 450M / 2.4 GHz
Graphics Processor
Intel HD Graphics
4g ram

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ok ive got to booting with GraphicsEnabler=No and it working do i now need to instal kexts for my graphics card?


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