Sometimes I clicked this network button:
Why it doesn't work (just like I haven't clicked it)?
When it failed, only when I reboot,it works again.
Sometimes it failed again.
What could I do?
I use ubuntu 11.04 64 bits.
Try this when it doesn't work -
If the above does not work then you can try this:
which a temporary solution. It will work until you reboot. For more details and a permanent solution: