Tue, 01 Oct 2013 09:40:40 +0100
I don’t pretend to understand much about wifi, but – historically, at least – I observe that the phrase “wireless net working” is often, like “military intelligence” or “road works ahead”, most charitably described as oxymoronic.
- a linux box with an “Intel Corporation Centrino Advanced-N 6230” network controller
- the iwlwifi module
- a dual-frequency (2.4GHz and 5GHz) smallish “Enterprise” network based on Ciso Meraki
The symptoms: sometimes it doesn’t work. Sometimes it works for a couple of minutes and then stops.
The hypothesis: iwlwifi or the hardware it’s talking to doesn’t like talking on 5GHz channels
The fix (first attempt):
:; cat /etc/modprobe.d/iwlwifi.conf options iwlwifi 5ghz_disable=1
The problem with this fix: it makes no difference. It turns out 5ghz_disable has no effect any longer
The fix (second attempt): add the line
freq_list=2412 2417 2422 2427 2432 2437 2442 2447 2452 2457 2462 2467 2472 2477 2482to the relevant
/etc/wpa_supplicant.conf. And be grateful you’re not using dbus
The result: it seems to be working so far.