Hmm, try connecting just the arduino again and do a
sudo tailf /var/log/messages
Again on my PC this results in :
Apr 4 15:14:37 main kernel: [ 1408.252013] usb 6-2: new full speed USB device using uhci_hcd and address 2
Apr 4 15:14:38 main kernel: [ 1408.510901] usb 6-2: configuration #1 chosen from 1 choice
Apr 4 15:14:38 main kernel: [ 1408.585677] usbserial: USB Serial support registered for FTDI USB Serial Device
Apr 4 15:14:38 main kernel: [ 1408.586375] ftdi_sio 6-2:1.0: FTDI USB Serial Device converter detected
Apr 4 15:14:38 main kernel: [ 1408.586954] ftdi_sio: Detected FT232RL
Apr 4 15:14:38 main kernel: [ 1408.588151] usb 6-2: FTDI USB Serial Device converter now attached to ttyUSB1
Apr 4 15:14:38 main kernel: [ 1408.588180] usbcore: registered new interface driver ftdi_sio
Apr 4 15:14:38 main kernel: [ 1408.588183] ftdi_sio: v1.4.3:USB FTDI Serial Converters Driver
Maybe you'll see some error messages that will help in tracking down your problem.
Did you add any udev rules for your card reader or camera ? If so, can you just comment them out, reboot the laptop and connect up only the Arduino ?
Ver