Raspberry PI wifi dongle not recognised -

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i use the original raspberry wifi dongle on raspberry pi 2. changed interface file in etc/network , wpa_supplicant.conf file, addding ssid , psk password wifi connection. , yet, not able connect wifi network. stranger in gui seems rasberry doesn't recognise wifi dongle. when left-click on network icon, says no wireless interfaces found. have suggestions may me solve issue? here last lines of dmesg command

[20108.919617] usb 1-1.2: product: remote download wireless adapter [20108.919633] usb 1-1.2: manufacturer: broadcom [20108.919650] usb 1-1.2: serialnumber: 000000000001 [20109.170317] brcmfmac: brcmf_c_preinit_dcmds: firmware version = wl0: apr  3 2014 04:43:32 version 6.10.198.66 (r467479) fwid 01-32bd010e [20109.190470] brcmfmac: brcmf_cfg80211_reg_notifier: not iso3166 code [20109.278344] brcmfmac: brcmf_add_if: error: netdev:wlan0 exists [20109.278371] brcmfmac: brcmf_add_if: ignore if event

here ifconfig wlan0 command gives:

wlan0     link encap:ethernet  hwaddr b4:ee:b4:87:2d:09             inet6 addr: fe80::b6ee:b4ff:fe87:2d09/64 scope:link           broadcast multicast  mtu:1500  metric:1           rx packets:3500 errors:0 dropped:11 overruns:0 frame:0           tx packets:49 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            rx bytes:1431948 (1.3 mib)  tx bytes:11710 (11.4 kib)


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