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[cangaru <johns@xxxxxxxxxx>]

This began when I migrated to a new server, the Intel I referred to, and
installed Ubuntu 15.04 on it. The standard kernel produced this error. I
tried many kernels. In the 4.4 and beyond series, including 4.5-wily, it
would not assemble or mount my raid array. So not much good there. But i
will test again. I am offsite at the moment so the apport does not
work...

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https://bugs.launchpad.net/bugs/1556782

Title:
  USB3 not working

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I am constantly getting these messages in dmesg:
  [114755.239681] usb 2-1: reset SuperSpeed USB device number 2 using xhci_hcd
  [114760.252354] usb 2-1: device descriptor read/8, error -110
  [114760.353433] usb 2-1: reset SuperSpeed USB device number 2 using xhci_hcd
  [114765.366486] usb 2-1: device descriptor read/8, error -110
  [114765.518703] sd 6:0:0:0: [sdf] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
  [114765.518705] usb 2-1: USB disconnect, device number 2
  [114765.518707] sd 6:0:0:0: [sdf] CDB: 
  [114765.518708] Write(10): 2a 00 3a 36 db b7 00 00 10 00
  [114765.518712] blk_update_request: I/O error, dev sdf, sector 976673719
  [114765.518720] Aborting journal on device sdf1-8.
  [114765.524571] sd 6:0:0:0: [sdf] FAILED Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK

  I am trying to use a Toshiba external disk, in a usb3 port which I use for backup. It worked flawlessly on an old version of Redhat, but on moving to a new server, Intel S1200RP with updated firmware, I am in a world of pain. I have switched off standby for usb on boot, I have ensured that power is continually on for all usb ports. 
  I have tried a number of kernels, currently 3.19.0-031900rc4-lowlatency which had been less bad, but am still getting this fault.

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