protected function usb()
    {
        foreach ($this->readdmesg() as $line) {
//            if (preg_match('/^(ugen[0-9\.]+): <(.*)> (.*) (.*)/', $line, $ar_buf)) {
//                    $dev->setName($ar_buf[1].": ".$ar_buf[2]);
            if (preg_match('/^(u[a-z]+[0-9]+): <([^,]*)(.*)> on (usbus[0-9]+)/', $line, $ar_buf)) {
                    $dev = new HWDevice();
                    $dev->setName($ar_buf[2]);
                    $this->sys->setUSBDevices($dev);
            }
        }
    }