>ну и что в последних строках kernel.log по поводу этого

при подключениии флэш-драйва :

Apr 3 17:12:07 localhost kernel: usb 1-5: new high speed USB device using ehci_hcd and address 2
Apr 3 17:12:07 localhost kernel: usb 1-5: configuration #1 chosen from 1 choice
Apr 3 17:12:07 localhost kernel: SCSI subsystem initialized
Apr 3 17:12:07 localhost kernel: Initializing USB Mass Storage driver...
Apr 3 17:12:07 localhost kernel: scsi0 : SCSI emulation for USB Mass Storage devices
Apr 3 17:12:07 localhost kernel: usbcore: registered new driver usb-storage
Apr 3 17:12:07 localhost kernel: USB Mass Storage support registered.
Apr 3 17:12:07 localhost kernel: usb-storage: device found at 2
Apr 3 17:12:07 localhost kernel: usb-storage: waiting for device to settle before scanning
Apr 3 17:12:12 localhost kernel:   Vendor: Kingston  Model: DataTraveler 2.0  Rev: 4.10
Apr 3 17:12:12 localhost kernel:   Type:   Direct-Access                      ANSI SCSI revision: 02
Apr 3 17:12:12 localhost kernel: usb-storage: device scan complete
Apr 3 17:12:13 localhost kernel: SCSI device sda: 251904 512-byte hdwr sectors (129 MB)
Apr 3 17:12:13 localhost kernel: sda: Write Protect is off
Apr 3 17:12:13 localhost kernel: sda: Mode Sense: 0b 00 00 08
Apr 3 17:12:13 localhost kernel: sda: assuming drive cache: write through
Apr 3 17:12:13 localhost kernel: SCSI device sda: 251904 512-byte hdwr sectors (129 MB)
Apr 3 17:12:13 localhost kernel: sda: Write Protect is off
Apr 3 17:12:13 localhost kernel: sda: Mode Sense: 0b 00 00 08
Apr 3 17:12:13 localhost kernel: sda: assuming drive cache: write through
Apr 3 17:12:13 localhost kernel:  sda: sda1
Apr 3 17:12:13 localhost kernel: sd 0:0:0:0: Attached scsi removable disk sda

при подключении usb-мыши:
Apr 3 17:15:39 localhost kernel: psmouse.c: bad data from KBC - timeout