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bbfa235
(Get the code!)
I'm seeing this currently with Karmic. My wireless simply stops working after a few hours (today, roughly 6 hours or more after startup). Nothing much was happening on the computer that was idling on IRC; when I came back, the wifi was dead, with stuff like this in kern.log:
Oct 20 15:43:02 kusanagi kernel: [21573.559107] ipw2200: Failed to send SSID: Reason -16
Oct 20 15:43:37 kusanagi kernel: [21608.594208] ipw2200: No space for Tx
Oct 20 15:43:37 kusanagi kernel: [21608.594213] ipw2200: Failed to send SCAN_REQUEST_EXT: Reason -16
Now, the only thing I tried that seemed to work was to
sudo rmmod ipw2200
sudo modprobe ipw2200
After which, it worked.