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I've already tried all possible (http://ubuntuforums.org/showpost.php?p=10129571&postcount=43) solutions, no progress. I'm in despair. In Windows (on the same machine) this adapter works stably.

Device: Trendnet TEW-649UB.

System details: Ubuntu 11.10;

leventov@leventov-ubuntu:~$ uname -a
Linux leventov-ubuntu 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
leventov@leventov-ubuntu:~$ lsusb
...
Bus 002 Device 002: ID 0bda:8172 Realtek Semiconductor Corp. RTL8191S WLAN Adapter
...
leventov@leventov-ubuntu:~$ dmesg | grep 8712 #current driver
[    8.146510] r8712u: module is from the staging directory, the quality is unknown, you have been warned.
[    8.147113] r8712u: DriverVersion: v7_0.20100831
[    8.147124] r8712u: register rtl8712_netdev_ops to netdev_ops
[    8.147127] r8712u: USB_SPEED_HIGH with 4 endpoints
[    8.147478] r8712u: Boot from EFUSE: Autoload OK
[    8.551272] r8712u: CustomerID = 0x0000
[    8.551275] r8712u: MAC Address from efuse = 00:14:d1:6c:52:19
[    8.551625] usbcore: registered new interface driver r8712u
[    9.501351] r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
[   10.160471] r8712u: 1 RCR=0x153f00e
[   10.161241] r8712u: 2 RCR=0x553f00e
leventov@leventov-ubuntu:~$ lsmod | grep 8712
r8712u                189049  0 t
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1 Answer

I am not sure there is a solution to this problem. I was googling for this exact same issue with my dongle and I have seen people struggle with the firmware being missing. Either that or a new driver solved this problem for most.

This morning I bought a new Billion Wifi Dongle, that uses the exact same chipset, and driver, but it works under Ubuntu 11.10. Perhaps in our case it is just badly behaved hardware, that somehow works with the windows drivers?

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