Comment 24 for bug 303802

Same here on a Lenovo W500, upgraded from Jaunty x64 to Karmic x64 when 9.10 was released.

I have to restart network manager each time it disconnects:

sudo /etc/init.d/network-manager restart

Using HTTP, SSH, SMTP, BitTorrent etc. the disconnects are very rare, it's more often with BitTorrent but I didn't have it running more than a few hours at a time.

However, VoIP (Pidgin with Google Talk) and Skype disconnect often.

Google Talk can last for a whole 10 minutes call, but it seems cumulative: sometimes it disconnects during the call, but not if I restart the network manager shortly before it.

With Skype it lasts maybe one minute. It failed each time I tried. I had to use my old PowerBook G4 running MacOS X 10.5 Leopard, which worked flawlessly, so I'm inclined to think that the problem is in my Ubuntu laptop, not the ASUS WIFI router. The network is encrypted with WPA2, which might be a factor according to a post I saw in Ubuntuforums saying that the problem didn't occur if the network was not encrypted.

I don't remember having these problems before updating to Karmic from Jaunty, but I've had the laptop just since last June and was most of August without Internet access.

This might be related to bug #483322 and bug #459933.