Dear linux development, please to add device to a proper driver. I wrote this requirement according log list message. My USB modem is D-link DWM-222 Vendor 3G Standard Default Id Modem Id User Modem Storage Diag Protocol(s) DWM-222 A1 LTE CAT4 2001:ab00 2001:7e35 2 1 5 0 serial & qmi Here is log: root@OpenWrt:~# dmesg |grep usb [ 4.440000] usbcore: registered new interface driver usbfs [ 4.440000] usbcore: registered new interface driver hub [ 4.450000] usbcore: registered new device driver usb [ 13.170000] usbcore: registered new interface driver usbserial [ 13.170000] usbcore: registered new interface driver usbserial_generic [ 13.180000] usbserial: USB Serial support registered for generic [ 13.190000] usbcore: registered new interface driver cdc_acm [ 13.210000] usbcore: registered new interface driver cdc_wdm [ 13.320000] usbcore: registered new interface driver cdc_ether [ 13.540000] usbcore: registered new interface driver option [ 13.540000] usbserial: USB Serial support registered for GSM modem (1-port) [ 13.570000] usbcore: registered new interface driver qmi_wwan [ 13.580000] usbcore: registered new interface driver rndis_host [ 19.450000] usb 1-1: new high-speed USB device number 2 using ehci-platform [ 19.640000] usbserial_generic 1-1:1.0: The "generic" usb-serial driver is only for testing and one-off prototypes. [ 19.640000] usbserial_generic 1-1:1.0: Tell linux-usb@xxxxxxxxxxxxxxx to add your device to a proper driver. [ 19.640000] usbserial_generic 1-1:1.0: generic converter detected [ 19.640000] usb 1-1: generic converter now attached to ttyUSB0 [ 19.660000] usbserial_generic 1-1:1.0: device disconnected Best regards Martin Ersil -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html