External USB3 drive (Seagate GoFlex) connected to a USB3 port fails to mount on OS. Same unit works on USB2 ports (at USB2 speeds).

I expect my external USB3 drive to be recognized by the OS and able to operate at USB3 speeds.

Mint 17 64-bit Cinammon (Ubuntu 14.04). Necessary details below or attached.

Ubuntu 3.13.0-24.46-generic 3.13.9
Description:	Linux Mint 17 Qiana
Release:	17

I have a Gigabyte GA-990FXA-UD3 motherboard.

UEFI/BIOS set to enable legacy USB support and both XHCI and EHCI handoff to OS (disabling these has no effect).

Same bug reported here:
https://bugs.launchpad.net/linuxmint/+bug/1348669

$dmesg | grep "usb 9-4"
[ 2133.637961] usb 9-4: new SuperSpeed USB device number 2 using xhci_hcd
[ 2133.653736] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2133.654362] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2133.654370] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2133.654377] usb 9-4: Product: GoFlex Desk
[ 2133.654383] usb 9-4: Manufacturer: Seagate
[ 2133.654388] usb 9-4: SerialNumber: NA0LP2NG
[ 2147.687559] usb 9-4: reset SuperSpeed USB device number 2 using xhci_hcd
[ 2147.703314] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2147.703610] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2147.703784] usb 9-4: USB disconnect, device number 2
[ 2148.092071] usb 9-4: new SuperSpeed USB device number 3 using xhci_hcd
[ 2148.107823] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2148.108449] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2148.108457] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2148.108464] usb 9-4: Product: GoFlex Desk
[ 2148.108470] usb 9-4: Manufacturer: Seagate
[ 2148.108475] usb 9-4: SerialNumber: NA0LP2NG
[ 2154.227723] usb 9-4: reset SuperSpeed USB device number 3 using xhci_hcd
[ 2154.243565] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2154.243813] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2154.244021] usb 9-4: USB disconnect, device number 3
[ 2154.632267] usb 9-4: new SuperSpeed USB device number 4 using xhci_hcd
[ 2154.648038] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2154.648678] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2154.648687] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2154.648694] usb 9-4: Product: GoFlex Desk
[ 2154.648700] usb 9-4: Manufacturer: Seagate
[ 2154.648705] usb 9-4: SerialNumber: NA0LP2NG
[ 2160.768006] usb 9-4: reset SuperSpeed USB device number 4 using xhci_hcd
[ 2160.783745] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2160.783997] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2160.784203] usb 9-4: USB disconnect, device number 4
[ 2161.172418] usb 9-4: new SuperSpeed USB device number 5 using xhci_hcd
[ 2161.188263] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2161.188887] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2161.188896] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2161.188903] usb 9-4: Product: GoFlex Desk
[ 2161.188908] usb 9-4: Manufacturer: Seagate
[ 2161.188913] usb 9-4: SerialNumber: NA0LP2NG
[ 2167.308200] usb 9-4: reset SuperSpeed USB device number 5 using xhci_hcd
[ 2167.323943] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2167.324190] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2167.324401] usb 9-4: USB disconnect, device number 5
[ 2167.712527] usb 9-4: new SuperSpeed USB device number 6 using xhci_hcd
[ 2167.728431] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2167.729066] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2167.729074] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2167.729081] usb 9-4: Product: GoFlex Desk
[ 2167.729087] usb 9-4: Manufacturer: Seagate
[ 2167.729092] usb 9-4: SerialNumber: NA0LP2NG
[ 2173.848366] usb 9-4: reset SuperSpeed USB device number 6 using xhci_hcd
[ 2173.864136] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2173.864388] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2173.864612] usb 9-4: USB disconnect, device number 6
[ 2174.252856] usb 9-4: new SuperSpeed USB device number 7 using xhci_hcd
[ 2174.268644] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2174.269349] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2174.269357] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2174.269364] usb 9-4: Product: GoFlex Desk
[ 2174.269370] usb 9-4: Manufacturer: Seagate
[ 2174.269375] usb 9-4: SerialNumber: NA0LP2NG
[ 2180.388613] usb 9-4: reset SuperSpeed USB device number 7 using xhci_hcd
[ 2180.404363] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2180.404611] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2180.404831] usb 9-4: USB disconnect, device number 7
[ 2180.945241] usb 9-4: new SuperSpeed USB device number 8 using xhci_hcd
[ 2180.961019] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2180.961691] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2180.961704] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2180.961712] usb 9-4: Product: GoFlex Desk
[ 2180.961718] usb 9-4: Manufacturer: Seagate
[ 2180.961723] usb 9-4: SerialNumber: NA0LP2NG
[ 2187.080974] usb 9-4: reset SuperSpeed USB device number 8 using xhci_hcd
[ 2187.096759] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2187.097008] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2187.097218] usb 9-4: USB disconnect, device number 8
[ 2187.485426] usb 9-4: new SuperSpeed USB device number 9 using xhci_hcd
[ 2187.501262] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2187.501891] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2187.501899] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2187.501905] usb 9-4: Product: GoFlex Desk
[ 2187.501911] usb 9-4: Manufacturer: Seagate
[ 2187.501916] usb 9-4: SerialNumber: NA0LP2NG
[ 2193.621110] usb 9-4: reset SuperSpeed USB device number 9 using xhci_hcd
[ 2193.636959] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2193.637216] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2193.637424] usb 9-4: USB disconnect, device number 9
[ 2194.025521] usb 9-4: new SuperSpeed USB device number 10 using xhci_hcd
[ 2194.041416] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2194.042070] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2194.042078] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2194.042085] usb 9-4: Product: GoFlex Desk
[ 2194.042091] usb 9-4: Manufacturer: Seagate
[ 2194.042096] usb 9-4: SerialNumber: NA0LP2NG
[ 2200.161400] usb 9-4: reset SuperSpeed USB device number 10 using xhci_hcd
[ 2200.177115] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2200.177388] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2200.177599] usb 9-4: USB disconnect, device number 10
[ 2200.565859] usb 9-4: new SuperSpeed USB device number 11 using xhci_hcd
[ 2200.581678] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2200.582342] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2200.582351] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2200.582358] usb 9-4: Product: GoFlex Desk
[ 2200.582363] usb 9-4: Manufacturer: Seagate
[ 2200.582368] usb 9-4: SerialNumber: NA0LP2NG
[ 2206.701605] usb 9-4: reset SuperSpeed USB device number 11 using xhci_hcd
[ 2206.717335] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2206.717582] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2206.717790] usb 9-4: USB disconnect, device number 11
[ 2207.126038] usb 9-4: new SuperSpeed USB device number 12 using xhci_hcd
[ 2207.141900] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2207.142578] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2207.142588] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2207.142595] usb 9-4: Product: GoFlex Desk
[ 2207.142601] usb 9-4: Manufacturer: Seagate
[ 2207.142606] usb 9-4: SerialNumber: NA0LP2NG
[ 2213.261855] usb 9-4: reset SuperSpeed USB device number 12 using xhci_hcd
[ 2213.277557] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2213.277809] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2213.278025] usb 9-4: USB disconnect, device number 12
[ 2213.666203] usb 9-4: new SuperSpeed USB device number 13 using xhci_hcd
[ 2213.682084] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2213.682709] usb 9-4: New USB device found, idVendor=0bc2, idProduct=50a5
[ 2213.682717] usb 9-4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2213.682724] usb 9-4: Product: GoFlex Desk
[ 2213.682729] usb 9-4: Manufacturer: Seagate
[ 2213.682734] usb 9-4: SerialNumber: NA0LP2NG
[ 2219.802029] usb 9-4: reset SuperSpeed USB device number 13 using xhci_hcd
[ 2219.817772] usb 9-4: Parent hub missing LPM exit latency info.  Power management will be impacted.
[ 2219.818020] usb 9-4: Busted HC?  Not enough HCD resources for old configuration.
[ 2219.818212] usb 9-4: USB disconnect, device number 13