[ubuntu] Wireless network connection very unstable.

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http://ubuntuforums.org – I'm having troubles with my internet connection in ubuntu right now. Well, a few actually. First, when I compare my speeds between ubuntu and Windows, I'm getting double my link speed on Windows than on ubuntu. Second, my internet connection periodically drops. Usually when I'm downloading a large file or putting a large load on my connection. I can't connect to the internet for a few seconds and then my connection just drops and tries to reconnect (which is does after a few seconds). I've tried a few fixes I've found around Google but none of them have helped me. My wired connection (Hardware)