[ubuntu] wireless is incredibly slow - maverick fresh install

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http://ubuntuforums.org – Hi, yesterday I did a fresh install with 10.10 on my notebook. Everything seemed to work fine, my ath9k wireless connected right away to my network. However, the network speed I get, according to the system monitor, is 0 most of the time and has bumps of around 1kb/s every 20 or so seconds. It's impossible to even think about using the internet. My smartphone uses the same network and runs perfectly well with the 6Mbit/s it's supposed to have, so I'm sure it's neither my router nor my ISP. Downloading the wireless backports package via phone and installing them did no good, either. Nobody on (HowTos)