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I did not installed it manually. i assume that when i installed virtualbox, it installed that kext to control the usb attached to VM's

Nope, I'm running the OSx on my windows based laptop. I use the virtual box to other OS within Mac.

Hello, I did follow your tip but cannot find anything strange on log. But i have an update: I think i found the kext responsible to start up the USB ports. Below i have a picture of the kexts loaded when USB ports are fine: This is the picture when USB ports are down but the card reader and...

Sorry, where I can find that log? I'm afraid that this is something random and i cannot find what's really causing it. It's really annoying have to reboot PC sometimes to USB ports become active and i can use the mouse, plug in pen drives, etc.

Vanilla kexts

My OS is 10.8.2. I did not install any USB 3 kexts ( on my original text i referred to my three USB ports, sorry if i induce you on error). For USB controllers I have the AppleStorageDrivers.kext. I have IOUSBFamily.kext which contains the kext responsible for loading my USB (AppleUSBEHCI)...

Hello, Recently I finally complete the installation of ML on my laptop PB TK85. After struggling a bit with the graphics card, i managed to make it fully functional. The wireless ,ethernet and sound cards are ok either. However there is one issue with the USB that i cannot solve. The 3 USB...