Re: trouble connecting via wifi with asus rt-ac66u router from 12.04 amd64
Many Linux drivers currently are troubled by 802.11N. Although I don't know which driver you are using, I suggest, as an experiment, that you temporarily turn off N speeds in the router. Now can you connect?
Some routers have a mixed WPA and WPA2 mode which also is troublesome to some Linux drivers. If yours uses such a mode, I suggest WPA2 only.
Finally, some drivers have a few parameters allowing tweaks to the hardware to driver interface. We can explore that if you'll tell us what driver you are using. Find out from the terminal with:
This takes a few moments, so please be patient.
sudo lshw -C network
Find your wireless device and see its driver like this example from my machine:
Tell us what the driver is and we'll proceed.
description: Wireless interface
product: Centrino Advanced-N 6200
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
width: 64 bits
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi
driverversion=3.5.0-26-generic firmware=22.214.171.124 build 25532 ip=192.168.1.120 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
"Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.