I have the subject adapter plugged into a powered USB hub on the latest raspian imagecat. I have previously successfully connected to the internet via my wlan using another adapter in the same hub, so I believe my wireless settings are correct for the SSID and password. With the other adapter I see it request an IP and one is assigned. On this adapter, I see the MAC address for the adapter displayed.
With the AWLL6075, i see the following in the dmesg output:
[ 4.739757] hub 1-1.3.4:1.0: 4 ports detected
[ 5.033337] usb 1-126.96.36.199: new high-speed USB device number 8 using dwc_otg
[ 5.146125] usb 1-188.8.131.52: New USB device found, idVendor=0bda, idProduct=8172
[ 5.160728] usb 1-184.108.40.206: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 5.175761] usb 1-220.127.116.11: Product: RTL8191S WLAN Adapter
[ 5.188518] usb 1-18.104.22.168: Manufacturer: Manufacturer Realtek
[ 5.201571] usb 1-22.214.171.124: SerialNumber: 00e04c000001
[ 5.822055] udevd: starting version 175
[ 7.658405] r8712u: module is from the staging directory, the quality is unknown, you have been warned.
[ 8.296447] r8712u: DriverVersion: v7_0.20100831
[ 8.437784] r8712u: register rtl8712_netdev_ops to netdev_ops
[ 8.576780] r8712u: USB_SPEED_HIGH with 4 endpoints
[ 8.712943] r8712u: Boot from EFUSE: Autoload OK
[ 9.055538] r8712u: CustomerID = 0x0000
[ 9.066921] r8712u: MAC Address from efuse = 00:e0:4c:72:00:01
[ 9.080174] r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
[ 9.096250] usbcore: registered new interface driver r8712u
Running iwlist wlan0 scan produces a valid enumeration of the access points available, so the driver can receive data from the adapter. However, executing sudo ifup wlano produces:
Listening on LPF/wlan0/ff:ff:ff:ff:ff:ff
Sending on LPF/wlan0/ff:ff:ff:ff:ff:ff
Sending on Socket/fallback
DHCPDISCOVER on wlan0 tp 255.255.255.255 poet 67 interval 5
DHCPDISCOVER on wlan0 tp 255.255.255.255 poet 67 interval 2
No DHCPOFFERS received.
Unable to obtain a lease on first try. Exiting.
Failed to bring up wlan0.
With the adapter that worked, the MAC address of the adapter appeared in the Listening and Sending lines and the DHCP server assigned an IP address
Any idea what the issue might be with this adapter and how I might fix it?