[ubuntu-it] Problema fotocamera e (meno) chiavetta usb

[Lince Pitagorica]

Ciao a tutti!
Io ho un portatile hp pavilion con su breezy. Quando provo a collegare 
la mia fotocamera digitale mi dà questo errore:

[4473512.680000] usb 2-1: new full speed USB device using ohci_hcd and 
address 10
[4473512.964000] scsi5 : SCSI emulation for USB Mass Storage devices
[4473512.966000] usb-storage: device found at 10
[4473512.966000] usb-storage: waiting for device to settle before scanning
[4473517.971000]   Vendor: HP        Model: PhotoSmart M407   Rev: No.1
[4473517.971000]   Type:   Direct-Access                      ANSI SCSI 
revision: 00
[4473517.995000] SCSI device sda: 245920 512-byte hdwr sectors (126 MB)
[4473518.002000] sda: Write Protect is off
[4473518.002000] sda: Mode Sense: 87 00 00 08
[4473518.002000] sda: assuming drive cache: write through
[4473518.021000] SCSI device sda: 245920 512-byte hdwr sectors (126 MB)
[4473518.028000] sda: Write Protect is off
[4473518.028000] sda: Mode Sense: 87 00 00 08
[4473518.028000] sda: assuming drive cache: write through
[4473518.028000]  /dev/scsi/host5/bus0/target0/lun0:<6>SCSI error : <5 0 
0 0> return code = 0x6000000
[4473768.060000] end_request: I/O error, dev sda, sector 0
[4473768.060000] Buffer I/O error on device sda, logical block 0

e scollegandola:

[4473863.200000] scsi: Device offlined - not ready after error recovery: 
host 5 channel 0 id 0 lun 0
[4473863.200000] SCSI error : <5 0 0 0> return code = 0x70000
[4473863.200000] end_request: I/O error, dev sda, sector 0
[4473863.200000] Buffer I/O error on device sda, logical block 0
[4473863.200000]  unable to read partition table
[4473863.200000] Attached scsi removable disk sda at scsi5, channel 0, 
id 0, lun 0
[4473863.206000] usb-storage: device scan complete
[4473863.234000] usb 2-1: USB disconnect, address 10


se provo a fare un normale mount -t etc... da riga di comando, non mi da 
più udienza... finchè dopo minuti:

mount: /dev/sda: impossibile leggere il superblocco

Ah, in altri pc va tranquillamente! Anche su questo a volte va... e mi 
fa lo stesso problema con la chiavetta, anche se meno di frequente...
Avete idee?

Grazie!