usb hub

Подключил usb хаб, втыкнул флешку - не определяется, помогите плз, вот лог:

~$ dmesg | grep -i usb
[ 0.072394] usbcore: registered new interface driver usbfs
[ 0.072423] usbcore: registered new interface driver hub
[ 0.072472] usbcore: registered new device driver usb
[ 0.855972] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.856001] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 0.856068] uhci_hcd: USB Universal Host Controller Interface driver
[ 0.856896] uhci_hcd 0000:00:11.2: new USB bus registered, assigned bus number 1
[ 0.857105] usb usb1: configuration #1 chosen from 1 choice
[ 0.857164] hub 1-0:1.0: USB hub found
[ 0.857341] uhci_hcd 0000:00:11.3: new USB bus registered, assigned bus number 2
[ 0.857527] usb usb2: configuration #1 chosen from 1 choice
[ 0.857569] hub 2-0:1.0: USB hub found
[ 8698.388080] usb 1-1: new full speed USB device using uhci_hcd and address 2
[ 8698.551265] usb 1-1: configuration #1 chosen from 1 choice
[ 8698.555127] hub 1-1:1.0: USB hub found
[ 8758.860166] usb 1-1: reset full speed USB device using uhci_hcd and address 2
[ 8760.024110] usb 1-1: USB disconnect, address 2
[ 8760.264074] usb 1-1: new full speed USB device using uhci_hcd and address 3
[ 8760.428225] usb 1-1: configuration #1 chosen from 1 choice
[ 8760.433815] hub 1-1:1.0: USB hub found
[ 8769.864076] usb 1-1: reset full speed USB device using uhci_hcd and address 3
[ 8798.500570] usb 1-1: USB disconnect, address 3
[ 9041.032078] usb 1-1: new full speed USB device using uhci_hcd and address 4
[ 9041.199214] usb 1-1: configuration #1 chosen from 1 choice
[ 9041.381921] Initializing USB Mass Storage driver...
[ 9041.382150] scsi2 : SCSI emulation for USB Mass Storage devices
[ 9041.382306] usbcore: registered new interface driver usb-storage
[ 9041.382312] USB Mass Storage support registered.
[ 9041.399898] usb-storage: device found at 4
[ 9041.399906] usb-storage: waiting for device to settle before scanning
[ 9046.398197] usb-storage: device scan complete
[ 9067.422452] usb 1-1: USB disconnect, address 4
[ 9695.548067] usb 1-1: new full speed USB device using uhci_hcd and address 5
[ 9695.723223] usb 1-1: configuration #1 chosen from 1 choice
[ 9695.733302] scsi3 : SCSI emulation for USB Mass Storage devices
[ 9695.733549] usb-storage: device found at 5
[ 9695.733553] usb-storage: waiting for device to settle before scanning
[ 9700.734217] usb-storage: device scan complete
[ 9701.138140] usb 1-1: USB disconnect, address 5
[ 9706.056062] usb 1-1: new full speed USB device using uhci_hcd and address 6
[ 9706.231225] usb 1-1: configuration #1 chosen from 1 choice
[ 9706.247294] scsi4 : SCSI emulation for USB Mass Storage devices
[ 9706.247538] usb-storage: device found at 6
[ 9706.247541] usb-storage: waiting for device to settle before scanning
[ 9711.245205] usb-storage: device scan complete
[ 9713.088097] usb 1-1: USB disconnect, address 6
[ 9717.796078] usb 1-1: new full speed USB device using uhci_hcd and address 7
[ 9718.464054] usb 1-1: device not accepting address 7, error -71
[ 9718.520109] hub 1-0:1.0: unable to enumerate USB device on port 1