on rockbox:

[    0.098253] ACPI: bus type USB registered
[    0.098314] usbcore: registered new interface driver usbfs
[    0.098348] usbcore: registered new interface driver hub
[    0.098448] usbcore: registered new device driver usb
[    1.043935] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.044106] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    1.044153] uhci_hcd: USB Universal Host Controller Interface driver
[    1.044310] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1
[    1.044439] usb usb1: New USB device found, idVendor=1d6b, idProduct=0001
[    1.044447] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    1.044452] usb usb1: Product: UHCI Host Controller
[    1.044457] usb usb1: Manufacturer: Linux 3.9.0-5-generic uhci_hcd
[    1.044461] usb usb1: SerialNumber: 0000:00:1d.0
[    1.044763] hub 1-0:1.0: USB hub found
[    1.045063] uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2
[    1.045174] usb usb2: New USB device found, idVendor=1d6b, idProduct=0001
[    1.045181] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    1.045186] usb usb2: Product: UHCI Host Controller
[    1.045191] usb usb2: Manufacturer: Linux 3.9.0-5-generic uhci_hcd
[    1.045195] usb usb2: SerialNumber: 0000:00:1d.1
[    1.045522] hub 2-0:1.0: USB hub found
[  361.540112] usb 1-1: new full-speed USB device number 2 using uhci_hcd
[  361.709151] usb 1-1: New USB device found, idVendor=0781, idProduct=74e1
[  361.709162] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  361.709168] usb 1-1: Product: Rockbox media player
[  361.709173] usb 1-1: Manufacturer: Rockbox.org
[  361.709178] usb 1-1: SerialNumber: 10000000100001B400002DCDF27F49B40
[  362.407892] Initializing USB Mass Storage driver...
[  362.412676] scsi2 : usb-storage 1-1:1.0
[  362.413252] usbcore: registered new interface driver usb-storage
[  362.413260] USB Mass Storage support registered.
[  393.744460] usb 1-1: USB disconnect, device number 2
[  393.936154] hub 1-0:1.0: unable to enumerate USB device on port 1

On ROM Recovery :

[    0.098253] ACPI: bus type USB registered
[    0.098314] usbcore: registered new interface driver usbfs
[    0.098348] usbcore: registered new interface driver hub
[    0.098448] usbcore: registered new device driver usb
[    1.043935] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.044106] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    1.044153] uhci_hcd: USB Universal Host Controller Interface driver
[    1.044310] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1
[    1.044439] usb usb1: New USB device found, idVendor=1d6b, idProduct=0001
[    1.044447] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    1.044452] usb usb1: Product: UHCI Host Controller
[    1.044457] usb usb1: Manufacturer: Linux 3.9.0-5-generic uhci_hcd
[    1.044461] usb usb1: SerialNumber: 0000:00:1d.0
[    1.044763] hub 1-0:1.0: USB hub found
[    1.045063] uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2
[    1.045174] usb usb2: New USB device found, idVendor=1d6b, idProduct=0001
[    1.045181] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    1.045186] usb usb2: Product: UHCI Host Controller
[    1.045191] usb usb2: Manufacturer: Linux 3.9.0-5-generic uhci_hcd
[    1.045195] usb usb2: SerialNumber: 0000:00:1d.1
[    1.045522] hub 2-0:1.0: USB hub found
[  361.540112] usb 1-1: new full-speed USB device number 2 using uhci_hcd
[  361.709151] usb 1-1: New USB device found, idVendor=0781, idProduct=74e1
[  361.709162] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  361.709168] usb 1-1: Product: Rockbox media player
[  361.709173] usb 1-1: Manufacturer: Rockbox.org
[  361.709178] usb 1-1: SerialNumber: 10000000100001B400002DCDF27F49B40
[  362.407892] Initializing USB Mass Storage driver...
[  362.412676] scsi2 : usb-storage 1-1:1.0
[  362.413252] usbcore: registered new interface driver usb-storage
[  362.413260] USB Mass Storage support registered.
[  393.744460] usb 1-1: USB disconnect, device number 2
[  393.936154] hub 1-0:1.0: unable to enumerate USB device on port 1
[ 1320.564102] usb 1-1: new full-speed USB device number 4 using uhci_hcd
[ 1320.725094] usb 1-1: New USB device found, idVendor=066f, idProduct=3780
[ 1320.725105] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1320.725110] usb 1-1: Product: ROM Recovery
[ 1320.725115] usb 1-1: Manufacturer: Sigmatel, Inc.
[ 1323.637705] usbcore: registered new interface driver usbhid
[ 1323.637718] usbhid: USB HID core driver
[ 1323.901950] hid-generic 0003:066F:3780.0001: hiddev0,hidraw0: USB HID v1.10 Device [Sigmatel, Inc. ROM Recovery] on usb-0000:00:1d.0-1/input0