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When I installed ubuntu I had a linksys n13 wireless dongle plugged in. Ubuntu installed itself accessed the Internet to get updates through the dongle then required a restart. The wireless service appeared in the list but the not connected message appeared I then deleted the connection profiles, refreshed the list and Internet worked for 5 minutes. Then I unplugged the USB dongle. Plugged it into a different port and it worked again for 5 minutes then stopped. Once I ran out of ports to try it no longer worked at all.
I plugged in a different wifi dongle a sennhauser It worked until I restarted the computer then it no longer connected. Any suggestions?

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