Comment 367 for bug 621265

I also experiment slowdowns under 10.04.3 with 3945ABG, usually after several minutes (5 to 10mn) full speed download (about 700-800 KB/s, upper limit of my ADSL connection, that can be reached with some torrents).

The only thing I notice in syslog is such kind of messages every minute or so:
"possible SYN flooding on port XXX. Sending cookies."

And I don't thing enabling syn cookies will do the trick, imo it's just a symptom of air interface going bad.

I first suspected my ISP doing throttling... but switching to a wired connection and bandwith comes back.

After the problem occurs once, indeed, wireless never returns to nominal performance until a reboot...