The problem I have is that when I enable Intel Virtualization Technology (or VT-x) in my BIOS, it makes my USB 2.0 ports not work. The USB 3 ports, on the other hand, are working.
This is happening under Windows (W8.1 x64) but also under bios, like if I don't connect a keyboard on my front USB 3 (or any USB3, I use front for convenience) I can't even get inside the BIOS. The first BIOS screen says "Keyboard not found" or something like that.
As soon as I disable VT-x, all USB ports are back to working again.
For information, I have an i7 2600 on an Asus P8Z68 V Pro Gen 3, and both Hibernate and Fast Boot are disabled on my Windows (although, I doubt it's a Windows problem since it happens in BIOS too, but not too sure about that, hence my asking here).
Thank you.
EDIT : I've looked for the following :
- VT-x USB
- Intel virtualization USB
- enabling virtualization blocks usb 2
- only usb 3 wortking with virtualization enabled
- p8z68 virtualization usb
I found zero resources about this happening under BIOS.