Pindu, sei que vc deve estar muito ocupado, mas vou te "explorar" mais um pouco!
Estou com o mesmo problema com minha cãmera fotográfica, pois plugo na usb para colher as fotos e não se "emociona" nem um pouquinho, ou seja, não "monta" nada . dei o comando Sudo dmesg | grep usb, mas não consegui identificar a a SONY aqui. Olha só em baixo:
evandro@evandro-desktop:~$ sudo dmesg | grep usb
[ 36.697315] usbcore: registered new interface driver usbfs
[ 36.697346] usbcore: registered new interface driver hub
[ 36.697385] usbcore: registered new device driver usb
[ 36.781933] usb usb1: configuration #1 chosen from 1 choice
[ 36.944572] usb usb2: configuration #1 chosen from 1 choice
[ 37.108492] usb usb3: configuration #1 chosen from 1 choice
[ 37.190352] usb 1-1: new low speed USB device using ohci_hcd and address 2
[ 37.242537] usb usb4: configuration #1 chosen from 1 choice
[ 38.289989] usb 4-7: new high speed USB device using ehci_hcd and address 4
[ 38.424583] usb 4-7: configuration #1 chosen from 2 choices
[ 38.729836] usb 1-1: new low speed USB device using ohci_hcd and address 3
[ 38.936308] usb 1-1: configuration #1 chosen from 1 choice
[ 39.261637] usb 1-2: new low speed USB device using ohci_hcd and address 4
[ 39.457165] usb 1-2: configuration #1 chosen from 1 choice
[ 39.461419] usbcore: registered new interface driver hiddev
[ 39.467244] input: USB HID v1.00 Keyboard [Cypress PS2toUSB KBM Bridge V2.02a] on usb-0000:00:1c.0-1
[ 39.477249] input: USB HID v1.00 Mouse [Cypress PS2toUSB KBM Bridge V2.02a] on usb-0000:00:1c.0-1
[ 39.481186] input: USB HID v1.10 Mouse [HID 062a:0001] on usb-0000:00:1c.0-2
[ 39.481204] usbcore: registered new interface driver usbhid
[ 39.481208] drivers/usb/input/hid-core.c: v2.6:USB HID core driver
[ 185.615880] usb 4-7: USB disconnect, address 4
[ 191.637818] usb 4-7: new high speed USB device using ehci_hcd and address 5
[ 191.772505] usb 4-7: configuration #1 chosen from 2 choices
[ 227.813529] usb 4-7: USB disconnect, address 5
[ 235.826786] usb 4-8: new high speed USB device using ehci_hcd and address 6
[ 235.962935] usb 4-8: configuration #1 chosen from 2 choices
[ 296.482175] usb 4-8: USB disconnect, address 6
[ 643.196249] usb 4-7: new high speed USB device using ehci_hcd and address 7
[ 643.338326] usb 4-7: configuration #1 chosen from 1 choice
[ 643.500548] usbcore: registered new interface driver libusual
[ 643.518685] usbcore: registered new interface driver usb-storage
[ 643.518864] usb-storage: device found at 7
[ 643.518868] usb-storage: waiting for device to settle before scanning
[ 648.518775] usb-storage: device scan complete
[ 1173.331954] usb 4-7: USB disconnect, address 7
[ 1244.699666] usb 4-7: new high speed USB device using ehci_hcd and address 8
[ 1244.837757] usb 4-7: configuration #1 chosen from 1 choice
[ 1244.838189] usb-storage: device found at 8
[ 1244.838192] usb-storage: waiting for device to settle before scanning
[ 1249.838236] usb-storage: device scan complete
[ 3721.953138] usb 4-7: USB disconnect, address 8
[ 3754.222144] usb 4-7: new high speed USB device using ehci_hcd and address 9
[ 3754.365078] usb 4-7: configuration #1 chosen from 2 choices
[ 3846.078914] usb 4-7: USB disconnect, address 9
[ 3849.453767] usb 4-8: new high speed USB device using ehci_hcd and address 10
[ 3849.589145] usb 4-8: configuration #1 chosen from 2 choices
[ 3928.059038] usb 4-8: USB disconnect, address 10
[ 3963.339034] usb 4-3: new high speed USB device using ehci_hcd and address 11
[ 3963.482208] usb 4-3: configuration #1 chosen from 2 choices
[ 4128.031017] usb 4-3: USB disconnect, address 11
[ 4342.438433] usb 4-7: new high speed USB device using ehci_hcd and address 12
[ 4342.577057] usb 4-7: configuration #1 chosen from 2 choices
[ 4380.201252] usb 4-7: USB disconnect, address 12
[ 4397.875226] usb 4-7: new high speed USB device using ehci_hcd and address 13
[ 4398.010081] usb 4-7: configuration #1 chosen from 2 choices
evandro@evandro-desktop:~$