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[Bug 1242321] Re: USB 3.0 Harddrive not recognised


I have more or less come up against this issue as well, with one exception;
two of the USB 3 ports on my Asrock FM2 AMD mobo are powered when the PC is off, i.e. to charge devices when the PC is not running. Ubuntu 14.04 LTS detects external USB3 HDD devices when they are plugged into these ports.  The other four USB 3 ports are not detected.

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  USB 3.0 Harddrive not recognised

Status in linux package in Ubuntu:

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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