I have a ThinkPad T520 running Ubuntu 11.10 (AMD64). I am connecting to a Cisco WAP (802.11N) secured with WPA2. At random times (happens up to a few times per hour) I lose connectivity. The network shows as connected, but I cannot access any LAN or WAN resources (cannot ping my gateway either).
The only way to get it working again is to turn off the physical WLAN switch, wait a moment, and then turn it back on (disconnecting / reconnecting and disabling / reenabling via the software menu doesn't work).
Any ideas why this might be occurring and what I can do to fix this issue? Would like to test drive 11.10 for a bit longer, but will have to move back to Windows if I can't get this resolved (as it is impacting productivity).
Thank you in advance.