Problem with HP mini 1104 wifi card in Ubuntu 12.04

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http://askubuntu.com – I have a HP mini 1104 with windows 7 installed by default. When I install Ubuntu 12.04 and try to activate the proprietary drivers, I only see the graphics card. When you connect to the wifi wireless card is turned off and intermittently, if it detects networks but does not have a stable connection. My network card is a Ralink RT3593 Does anyone know the solution to my problem? (HowTos)