When I bought the asus wireless NIC, My dekstop was using the Windows. but recently I changed to Ubuntu 14.04 Dekstop. The hell of the WIRELESS was started from that time.
The driver which provided by Asus is not supported to Kernel 3.x version. I found the patched version from the github.com
Download the files, and run command.
sudo make && sudo make instal
This commands are only accepted to current session. After reboot the computer, you will have to enabled the driver again.
Add the ifconfig ra0 up to the /etc/rc.local and add rt5592sta to the /etc/modules
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