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wireless driver not working under 'old' linux kernel

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http://askubuntu.com – this is my first post in the forums. I have peppermint os, a variant of Lubuntu 12.0.4, on my laptop. Ever since installing ubuntu, I faced problems with getting my wireless card to work. The network manager applet would tell me that I was connected with a wireless Port, but I would still be unable to use the internet (Browsers returning "not connected to network"). The problem exists with every ubuntu-based distro I tried. My wireless card is an RT3090BC4 card. Even after installing the driver packages from the manufacturer, my wifi card would still fail to get me connected to my room's wif (HowTos)