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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1254261

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1254261

Title:
  xhci regression: usb 3.0 hdd disconnects immediately

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  On a fresh saucey installation (kernel 3.11), I can not use my
  external usb 3.0 hdd on usb 3.0 ports, it only works on usb 2 ports.
  kernel log shows, that it disconnects immediately after it is plugged
  in. Then it continues to connect and disconnect indefinitely (q.v.
  attached dmesg log):

  [ 2623.116141] usb 3-5: new SuperSpeed USB device number 2 using xhci_hcd
  [ 2623.132574] usb 3-5: New USB device found, idVendor=1058, idProduct=0740
  [ 2623.132582] usb 3-5: New USB device strings: Mfr=1, Product=2, SerialNumber=5
  [ 2623.132587] usb 3-5: Product: My Passport 0740
  [ 2623.132591] usb 3-5: Manufacturer: Western Digital
  [ 2623.132595] usb 3-5: SerialNumber: 575847314139315836343531
  [ 2623.133533] usb-storage 3-5:1.0: USB Mass Storage device detected
  [ 2623.133758] scsi7 : usb-storage 3-5:1.0
  [ 2624.299678] usb 3-5: USB disconnect, device number 2
  [ 2645.281554] scsi 7:0:0:0: Device offlined - not ready after error recovery
  [ 2645.281727] usb 3-5: Set SEL for device-initiated U1 failed.
  [ 2645.281730] usb 3-5: Set SEL for device-initiated U2 failed.
  [ 2645.521559] usb 3-5: new SuperSpeed USB device number 3 using xhci_hcd
  ...

  The same hw combination works with kernel 3.2 in precise, but not with
  3.8 (see attachments below). I even tried 3.12 coming with trusty, but
  got the same log messages as with 3.11.

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