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[cement_head <1242321@xxxxxxxxxxxxxxxxxx>]

Again, this is NOT a LINUX problem.  This is a manufacturer of your USB
3.0 device problem.  They (the manufacturer) is NOT following the xHCI
USB 3.0 specs and therefore the device does not work properly.  In other
words, it's likely the external HDD, not the machine, nor the O/S
(Ubuntu).

The reason your USB 3.0 device works in Windows, is that (a) either
Microsoft wrote some hacky drivers for the bad device, or (b) the
manufacturer of the device submitted a "driver" to Microsoft so that
it's sub-standard firmware/hardware would work on Windows.

-- 
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https://bugs.launchpad.net/bugs/1242321

Title:
  USB 3.0 Harddrive not recognised

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu is not recognising any device plugged into any USB 3.0 ports.
  Sometimes Ubuntu will freeze for a few seconds when you plug something
  into a USB 3.0 port; when Ubuntu comes out of the freeze, the device
  is still NOT recognised.

  No problems with USB 2.0 ports and devices.

  The USB 3.0 on this computer only works in Windows 7 (I'm dual booting
  Ubuntu 13.10 and Windows 7, both are 64-bit).

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