after hotplug usb
/var/log/messeges:
Sep 24 08:31:05 radoslavk kernel: hub.c: USB hub found
Sep 24 08:31:05 radoslavk kernel: hub.c: 1 port detected
Sep 24 08:31:06 radoslavk kernel: hub.c: new USB device 00:1f.4-2.1, assigned address 3
Sep 24 08:31:06 radoslavk kernel: usb.c: USB device 3 (vend/prod 0x67b/0x2517) is not claimed by any active driver.
Sep 24 08:31:08 radoslavk usb.agent[3288]: missing kernel or user mode driver usbcore
Sep 24 08:31:09 radoslavk usb.agent[3288]: missing kernel or user mode driver usbcore
Sep 24 08:31:09 radoslavk kernel: Initializing USB Mass Storage driver...
Sep 24 08:31:09 radoslavk kernel: usb.c: registered new driver usb-storage
Sep 24 08:31:09 radoslavk kernel: scsi1 : SCSI emulation for USB Mass Storage devices
Sep 24 08:31:09 radoslavk kernel: Vendor: Prolific Model: USB Flash Disk Rev: P1.0
Sep 24 08:31:09 radoslavk kernel: Type: Direct-Access ANSI SCSI revision: 02
Sep 24 08:31:09 radoslavk kernel: USB Mass Storage support registered.
Sep 24 08:31:09 radoslavk scsi.agent[3370]: bogus sysfs DEVPATH=
Sep 24 08:31:09 radoslavk scsi.agent[3372]: bogus sysfs DEVPATH=
Sep 24 08:31:25 radoslavk su(pam_unix)[3428]: session opened for user root by dusan(uid=503)
Sep 24 08:31:30 radoslavk usb.agent[3468]: Bad USB agent invocation, no action
THANKS!