[    0.200638] usbcore: registered new interface driver usbfs
[    0.200650] usbcore: registered new interface driver hub
[    0.200674] usbcore: registered new device driver usb
[    0.893044] usb 2-4: new high speed USB device using ehci_hcd and address 3
[    1.389089] usb 6-1: new full speed USB device using uhci_hcd and address 2
[    1.796043] usb 7-2: new full speed USB device using uhci_hcd and address 2
[    9.576123] usb 7-2: USB disconnect, address 2
[    9.587152] input: HP Webcam as /devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0/input/input7
[    9.587415] usbcore: registered new interface driver uvcvideo
[    9.700336] usbcore: registered new interface driver btusb
[  775.048188] usb 4-2: new low speed USB device using uhci_hcd and address 2
[  775.172202] usb 4-2: device descriptor read/64, error -71
[  775.396175] usb 4-2: device descriptor read/64, error -71
[  775.612180] usb 4-2: new low speed USB device using uhci_hcd and address 3
[  775.733179] usb 4-2: device descriptor read/64, error -71
[  775.956202] usb 4-2: device descriptor read/64, error -71
[  776.172199] usb 4-2: new low speed USB device using uhci_hcd and address 4
[  776.580180] usb 4-2: device not accepting address 4, error -71
[  776.692210] usb 4-2: new low speed USB device using uhci_hcd and address 5
[  777.101209] usb 4-2: device not accepting address 5, error -71
[ 1027.908195] usb 4-2: new low speed USB device using uhci_hcd and address 6
[ 1028.033044] usb 4-2: device descriptor read/64, error -71
[ 1028.261219] usb 4-2: device descriptor read/64, error -71
[ 1028.476216] usb 4-2: new low speed USB device using uhci_hcd and address 7
[ 1029.008230] usb 4-2: device not accepting address 7, error -71
[ 1029.120218] usb 4-2: new low speed USB device using uhci_hcd and address 8
[ 1029.152379] usb 4-2: device descriptor read/8, error -71
[ 1029.284380] usb 4-2: device descriptor read/8, error -71
[ 1029.501210] usb 4-2: new low speed USB device using uhci_hcd and address 9
[ 1029.916182] usb 4-2: device not accepting address 9, error -71,