[ubuntu] random disconnects while downloading torrent files...(tethered connection)

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http://ubuntuforums.org – hello. yes, while downloading torrent files, and using a tethered connection, i continuously loase my internet connection and can then reconnect, by typing in the necessary commands in a terminal window, 2 or 3 times. after 2 or 3 times of reconnecting i have to restart the computer. does anybody have any suggestions as to how to stop the disconnects from occuring? thanks in advance... (Hardware)