I have PC based on Asus Z87-PRO Motherboard. I have installed both Windows 7 & Ubuntu 15.04.
When I have to reset Ubuntu (e.g. because of freezing) all of USB 3.0 ports stop working. Completely - I mean neither windows, nor Ubuntu, nor even UEFI see them. To get USB 3.0 working back, I have to re-upload onboard USB 3.0 controller firmware using windows application provided by Asus.
Any idea what is causing this problem?