I have a Kingston 4-in-1 Multimedia reader. When my PC was formatted with Win7 it worked fine. I decided to change to Ubuntu 14.04 and now it doesn't work. If I plug it into one of the USB2 ports it works fine, but whenever I plug it into one of the USB3 ports, it thinks about it for a minute and then dies. Here's the output of dmesg when it dies

    [110262.148656] usb 4-1: new SuperSpeed USB device number 3 using xhci_hcd
[110262.170330] usb 4-1: Parent hub missing LPM exit latency info.  Power management will be impacted.
[110262.266379] usb 4-1: New USB device found, idVendor=11b0, idProduct=6348
[110262.266386] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[110262.266390] usb 4-1: Product: USB3.0 Media Reader
[110262.266394] usb 4-1: Manufacturer: Kingston
[110262.266398] usb 4-1: SerialNumber: 08735314400198
[110262.272929] usb-storage 4-1:1.0: USB Mass Storage device detected
[110262.273239] scsi15 : usb-storage 4-1:1.0
[110263.290056] scsi 15:0:0:0: Direct-Access              FCR-HS3       -0 1.00 PQ: 0 ANSI: 4
[110263.306622] scsi 15:0:0:1: Direct-Access              FCR-HS3       -1 1.00 PQ: 0 ANSI: 4
[110263.323292] scsi 15:0:0:2: Direct-Access              FCR-HS3       -2 1.00 PQ: 0 ANSI: 4
[110263.339858] scsi 15:0:0:3: Direct-Access              FCR-HS3       -3 1.00 PQ: 0 ANSI: 4
[110263.340332] sd 15:0:0:0: Attached scsi generic sg3 type 0
[110263.340706] sd 15:0:0:1: Attached scsi generic sg4 type 0
[110263.340850] sd 15:0:0:2: Attached scsi generic sg5 type 0
[110263.340975] sd 15:0:0:3: Attached scsi generic sg6 type 0
[110264.651847] sd 15:0:0:1: [sde] 31116288 512-byte logical blocks: (15.9 GB/14.8 GiB)
[110264.667049] sd 15:0:0:1: [sde] Write Protect is off
[110264.667055] sd 15:0:0:1: [sde] Mode Sense: 2f 00 00 00
[110264.682767] sd 15:0:0:1: [sde] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[110264.694975] sd 15:0:0:2: [sdf] Attached SCSI removable disk
[110264.697933] sd 15:0:0:3: [sdg] Attached SCSI removable disk
[110264.729918] sd 15:0:0:0: [sdd] Attached SCSI removable disk
[110264.754189]  sde: sde1
[110264.760114] sd 15:0:0:1: [sde] Attached SCSI removable disk
[110275.377368] usb 4-1: reset SuperSpeed USB device number 3 using xhci_hcd
[110275.398453] usb 4-1: Parent hub missing LPM exit latency info.  Power management will be impacted.
[110275.436592] xhci_hcd 0000:05:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff8802e4fb9980
[110275.436600] xhci_hcd 0000:05:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff8802e4fb99c0
[110277.263444] usb 4-1: USB disconnect, device number 3