First lets see what is your wifi card info, type the following in a terminal: lspci | grep Wireless My info is: 02:00.0 Network controller: RaLink RT3090 Wireless 802.11n 1T/1R PCIe Next you have to install the dkms package: sudo aptitude install dkms Now download the file rt3090-dkms_2.3.1.7-0ubuntu0~ppa2_all.deb from this page (I’m using Ubuntu 10.04, [...]