1 Oct 2013 dan   » (Master)

iwl if you will

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.

The ingredients:

  • 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=2412,2417,2422,2427,2432,2437,2442,2447,2452,2457,2462,2467,2472,2477,2482
to the relevant network clause in /etc/wpa_supplicant.conf. And be grateful you’re not using dbus

The result: it seems to be working so far.

In other news, Schuko is hacky-but-probably-functional Showoff-style Markdown→HTML presentation software, in Clojure(script). It generates a static HTML file which you can host anywhere, and uses client-side Javascript and CSS for navigation and page flipping transitions.

Syndicated 2013-10-01 08:40:40 from diary at Telent Netowrks

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