[   99.060074] usb 1-1: new high speed USB device using ehci_hcd and address 2
[  139.650767] usb 1-1: USB disconnect, address 2
[  141.830689] usb 1-2: new high speed USB device using ehci_hcd and address 3
[  163.681434] usb 1-2: USB disconnect, address 3
[  166.270054] usb 1-5: new high speed USB device using ehci_hcd and address 4
[  190.306172] usb 1-5: USB disconnect, address 4
[  192.470164] usb 8-3: new high speed USB device using xhci_hcd and address 0
[  192.492781] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
[  192.493403] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
[  192.494027] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
[  192.494652] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
[  192.495341] usb 8-3: ep 0x84 - rounding interval to 4096 microframes
[  192.497413] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
[  216.640083] usb 8-3: USB disconnect, address 2
[  217.970162] usb 8-4: new high speed USB device using xhci_hcd and address 0
[  217.992821] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
[  217.993440] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
[  217.994064] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
[  217.994689] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
[  217.995372] usb 8-4: ep 0x84 - rounding interval to 4096 microframes
[  217.997576] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
[  294.840061] usb 1-1: new high speed USB device using ehci_hcd and address 5
[  295.026816] Initializing USB Mass Storage driver...
[  295.027073] scsi6 : usb-storage 1-1:1.0
[  295.027232] usbcore: registered new interface driver usb-storage
[  295.027236] USB Mass Storage support registered.
[  296.219622] scsi 6:0:0:0: Direct-Access     USB 2.0  Flash Disk       1.00 PQ: 0 ANSI: 2
[  296.221597] sd 6:0:0:0: Attached scsi generic sg1 type 0
[  296.224185] sd 6:0:0:0: [sdb] 7929856 512-byte logical blocks: (4.06 GB/3.78 GiB)
[  296.226720] sd 6:0:0:0: [sdb] Write Protect is off
[  296.226738] sd 6:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  296.226746] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[  296.231401] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[  296.231424]  sdb:
[  296.238071] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[  296.238086] sd 6:0:0:0: [sdb] Attached SCSI removable disk
ubuntu@ubuntu:~$