usb problem

[Stevan Kanban <ojingo@nerim.net>]

Hello,

I cannot find any solution to solve my usb problem.
My usb controller seems to be OK but any time i plug a usb device i cannot use it. When i mount the device, it blocks my cancel and i even cannot kill 
the process.

# lsmod
Module                  Size  Used by
<...>
ohci_hcd               34628  0
sd_mod                 18880  0
sg                     34016  0
usb_storage            42304  0
usbcore               125408  4 ohci_hcd,usb_storage
scsi_mod               83200  3 sd_mod,sg,usb_storage

# lspci -v
<...>
0000:00:07.4 USB Controller: Advanced Micro Devices [AMD] AMD-756 [Viper] USB (rev 06) (prog-if 10 [OHCI])
        Flags: bus master, medium devsel, latency 16, IRQ 10
        Memory at efffe000 (32-bit, non-prefetchable) [size=4K]
<...>

I plug my device, for example my camera (Pentax Optio), these lines appear:
# ohci_hcd 0000:00:07.4: remote wakeup
usb 1-1: new full speed USB device using address 2
usb 1-1: Product: PENTAX OPTIO S
usb 1-1: Manufacturer: PENTAX
scsi0 : SCSI emulation for USB Mass Storage devices
  Vendor: Pentax    Model: Optio S/S4        Rev: 1000
  Type:   Direct-Access                      ANSI SCSI revision: 02
SCSI device sda: 250880 512-byte hdwr sectors (128 MB)
sda: assuming Write Enabled
sda: assuming drive cache: write through
 sda:<7>usb-storage: queuecommand called
SCSI error : <0 0 0 0> return code = 0x70000
end_request: I/O error, dev sda, sector 0
Buffer I/O error on device sda, logical block 0
SCSI error : <0 0 0 0> return code = 0x70000
end_request: I/O error, dev sda, sector 0
Buffer I/O error on device sda, logical block 0
 unable to read partition table
Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0,  type 0
hub 1-0:1.0: port 1 disabled by hub (EMI?), re-enabling...<7>hub 1-0:1.0: port 1, status 0101, change 0002, 12 Mb/s
usb 1-1: USB disconnect, address 2
usb 1-1: new full speed USB device using address 3
usb 1-1: Product: PENTAX OPTIO S
usb 1-1: Manufacturer: PENTAX
scsi1 : SCSI emulation for USB Mass Storage devices
  Vendor: Pentax    Model: Optio S/S4        Rev: 1000
  Type:   Direct-Access                      ANSI SCSI revision: 02
SCSI device sda: 250880 512-byte hdwr sectors (128 MB)
sda: assuming Write Enabled
sda: assuming drive cache: write through
 sda:<7>usb-storage: queuecommand called

The /var/log/syslog is more long. I can attach if needed.
With my usb key, i got the same answers from my system.

# lsusb

<My system doesn't answer>

# mount /media/camera/

<My system doesn't answer>

Any idea?

-- 
Stevan Kanban