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I have Lenovo Z575 and problems with Wifi connection. After a short battle with drivers, and eventually installing ndiswrapper and windows drivers, wifi0 interface does not show up in the ifconfig...

ifconfig -a gives only lo and eth0.

Although, wireless hardware is presend; lspci gives 02:00.0 Network controller: Ralink corp. RT3090 Wireless 802.11n 1T/1R PCIe

Simple ifup wifi0 gives Ignoring unknown interface wifi0=wifi0.

Any idea how to fix wifi?

Edit

rfkill unblock all does not help

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1 Answer

Remove ndiswrapper and all settings related to that.

Download linux driver from the official site for your product (most likely RT3090PciE)

Assuming you saved it to Downloads directory, follow the commands to compile it

sudo apt-get install linux-headers-$(uname -r) build-essential

cd Downloads

tar -xaf <DOWNLOADED_FILE_NAME>.tar.bz2

cd <DOWNLOADED_FILE_NAME>

WPA1=HAS_WPA_SUPPLICANT

WPA2=HAS_NATIVE_WPA_SUPPLICANT

sed -i -e "s/$WPA1=n/$WPA1=y/g" -e "s/$WPA2=n/$WPA2=y/g" os/linux/config.mk

sudo make && sudo make install && sudo make clean

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Thanks. I applied this patch (infty.nl/wordpress/2011/09/…) to compile it, did make and make install but still I do not see the interface (after restart) –  Jakub M. Jul 8 '12 at 17:32
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