Well, sounds like a Dell laptop, what model? What have you tried? USBBusFix=Yes? Built in track-pad, USB mouse and built-in keyboard not working right? Have you tried any PS/2 kext? If you could, please put your system info in your signature as p.H. and myself have for example. Makes 1000 times easier to help
well it's Inspiron 5520 i tried USBBusFix=Yes , cpus=1 track pad + USB mouse + Keyboard weren't working but after installing a ps2 kext ... I am now have my keyboard working my specifications: Core i5 motherboard : Dell 0xwh1p bios : A06 graphic card: Amd radeon hd 7670m - Intel HD 4000 ram : 4.00 gb audio : Conexant smartaudio
usb mouse should always work without problems Did you try unplug it and replug ?
yes i did and it worked and then stopped again and i tried changing the mouse but the same result