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| Edited by kris85 at 2015-10-14 00:45 
 I have also firmware-ralink installed, but i typed like Makenai : udevadm monitor --environment --udev
 
 
 root@OrangePI:~# udevadm monitor --environment --udevmonitor will print the received events for:
 UDEV - the event which udev sends out after rule processing
 
 UDEV  [8316.293859] add      /devices/platform/sunxi-ehci.4/usb4/4-1 (usb)
 ACTION=add
 BUSNUM=004
 DEVNAME=/dev/bus/usb/004/006
 DEVNUM=006
 DEVPATH=/devices/platform/sunxi-ehci.4/usb4/4-1
 DEVTYPE=usb_device
 ID_BUS=usb
 ID_MODEL=802.11_bg_WLAN
 ID_MODEL_ENC=802.11\x20bg\x20WLAN
 ID_MODEL_FROM_DATABASE=RT2501/RT2573 Wireless Adapter
 ID_MODEL_ID=2573
 ID_REVISION=0001
 ID_SERIAL=Ralink_802.11_bg_WLAN
 ID_USB_INTERFACES=:ffffff:
 ID_VENDOR=Ralink
 ID_VENDOR_ENC=Ralink
 ID_VENDOR_FROM_DATABASE=Ralink Technology, Corp.
 ID_VENDOR_ID=148f
 MAJOR=189
 MINOR=389
 PRODUCT=148f/2573/1
 SEQNUM=1770
 SUBSYSTEM=usb
 TYPE=0/0/0
 USEC_INITIALIZED=16275206
 
 UDEV  [8316.301975] add      /devices/platform/sunxi-ehci.4/usb4/4-1/4-1:1.0 (usb)
 ACTION=add
 DEVPATH=/devices/platform/sunxi-ehci.4/usb4/4-1/4-1:1.0
 DEVTYPE=usb_interface
 ID_MODEL_FROM_DATABASE=RT2501/RT2573 Wireless Adapter
 ID_VENDOR_FROM_DATABASE=Ralink Technology, Corp.
 INTERFACE=255/255/255
 MODALIAS=usb:v148Fp2573d0001dc00dsc00dp00icFFiscFFipFF
 PRODUCT=148f/2573/1
 SEQNUM=1771
 SUBSYSTEM=usb
 TYPE=0/0/0
 USEC_INITIALIZED=277064
 
 UDEV  [8316.302563] add      /devices/platform/sunxi-ehci.4/usb4/4-1/usb_device/usbdev4.6 (usb_device)
 ACTION=add
 DEVNAME=/dev/usbdev4.6
 DEVPATH=/devices/platform/sunxi-ehci.4/usb4/4-1/usb_device/usbdev4.6
 MAJOR=189
 MINOR=389
 SEQNUM=1772
 SUBSYSTEM=usb_device
 USEC_INITIALIZED=16275206
and result of : lsusb -t :
 
 root@OrangePI:~# lsusb -t/:  Bus 08.Port 1: Dev 1, Class=root_hub, Driver=sunxi-ohci/1p, 12M
 /:  Bus 07.Port 1: Dev 1, Class=root_hub, Driver=sunxi-ohci/1p, 12M
 /:  Bus 06.Port 1: Dev 1, Class=root_hub, Driver=sunxi-ohci/1p, 12M
 /:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=sunxi-ohci/1p, 12M
 /:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=sunxi-ehci/1p, 480M
 |__ Port 1: Dev 6, If 0, Class=Vendor Specific Class, Driver=, 480M
 /:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=sunxi-ehci/1p, 480M
 |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 480M
 /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=sunxi-ehci/1p, 480M
 /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=sunxi-ehci/1p, 480M
So driver not loaded.
 
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