All Things Unix
reply to Snakeoil
Re: How do you improve network speeds? This is the relevant part: Ralink corp. RT3062 Wireless 802.11n 2T/2R
The good news is that it is capable of using two channels. The other news is that some folks have had challenges with the latest driver (I think you're pretty current on Ubuntu) and dropped back to an older one.
The things I've read don't mention specifically channel width capability with Linux.
Mountain View, CA
Please do not use 40MHz with 802.11n if using 2.4GHz and there are a substantial number of APs around you actively using channels within the frequency range you plan to use. Doing so may induce interference/increase unreliability for people around you. If unsure, please use 20MHz!
Reference material for my opinion/statement is here (read, do not skim): »www.smallnetbuilder.com/wireless···z-part-1
Here's a visual diagram showing exactly what you end up doing with 40MHz: »en.wikipedia.org/wiki/File:NonOv···N-en.svg
If there are no surrounding APs using those frequency ranges, sure, 40MHz would be fine to use. But chances are (in this day and age) that's not the case.
Bottom line: if you care about speed, use a wired connection. No debate or arguments please. 802.11 -- all revisions -- is quite a disgusting mess.
Making life hard for others since 1977.
I speak for myself and not my employer/affiliates of my employer.
All Things Unix
Your points are valid, but do not address the OP's question. I run wires for everything where practical, but accept that not everyone has that luxury.
40MHz usage may make you a bad neighbor in an apartment, but where the OP lives lot sizes are large. Output power can usually be turned down as well to mitigate interference.
A blanket "do not use" warning is not indicated, I think.