a friend of mine has the same problem like many other users with Ubuntu Precise. With Ubuntu 12.04 wireless is dropping sometimes. He has to reconnect to the wifi SSID.
This is the relevant output of such a drop: http://fixee.org/paste/8hwpt89/
Would be nice to get help if someone knows why this occurs.
Info The network hardware is the following: http://fixee.org/paste/tu9x728/
I post this as links to keep the question short and clean
Update 2nd of May
Here you have more dmesg
informations: http://fixee.org/paste/tkv95th/
Try by changing the security method of your router from WEP to WPA/WPA2. I have the same wireless hardware and had this issue but after changing the security the wireless connection worked fine for me. (Yes this solution aaplies to you if you are using WEP security)
I got idea of changing the security method from this link - Wireless with WEP extremely slow on an Acer Timeline 4810T with a Centrino Wireless-N 1000
Thanks.
http://ubuntuforums.org/showthread.php?t=1971571
Faça download do driver adequado em http://intellinuxwireless.org/?n=downloads, descompacte-o e copie para a pasta /lib/firmware
Google translate from Portuguese:
Download the appropriate driver in http://intellinuxwireless.org/?n=downloads, unzip it and copy it to the folder /lib/firmware