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I have a 32 bit machine running Ubuntu 12.10 with WiFi on it. I have a WPA2 network at home, but if I leave the USB Adapter plugged in while it boots, it infinitely keeps asking for the network password but never connects.

If I plug it in after boot, it will connect but then I can't access ANYTHING on the LAN or Internet because "the DNS servers are unreachable". Now, if I leave the computer on a while, I get lucky sometimes and it MAGICALLY decides to connect for a little bit, lock the machine though and the Internet's gone again.

The weirdest thing, is when I am connected but can't get to the internet, I do a netstat or ifconfig wlan0, I do have an IP address and everything.

It says I'm connected but its not.

I have a Realtek RTL8188CU USB adapter.

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up vote 1 down vote accepted

The drivers for the USB dongles are sometimes a pain. Realtek's web site can help somewhat but not all adapters will work with the latest kernel without some massaging. So, here is the web site for the newest drivers REALTEK

after which you will need to blacklist a file. You want to edit /etc/modprobe.d/blacklist.conf

Open the terminal and type:

sudo gedit /etc/modprobe.d/blacklist.conf

Go to the end of the file and add the line:

blacklist rtl8192cu

Use this guide as a resource

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Thank you! It works perfectly now :) – seanthewebber Nov 4 '12 at 19:37

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