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[zebul666 <zebul666@xxxxxxxxxxx>]

I have this problem too with my WD passport external USB 3 HDD and USB 3
port of my Dell Inspiron 15 (2521)

i.e. the (USB 3) HDD is not recognized when plugged in USB 3 ports

However USB 2 device device work fine on the USB 3 ports. Only USB 3
device are not recognized.

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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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