slow/weak wifi atheros AR9285 ubuntu 12.04

Asked by Noam Wajnman on 2012-07-24

Dear Ubuntu Team,
I am getting a very poor performance from my atheros AR9285 device on ubuntu 12.04. Even if I am right next to the AP the signal strength is only 3/4 bars and the wifi performance is slow. If I go just a few metres away to my living room then the signal strength rapidly drops to the point where I can barely connect. When I boot up my computer in windows I have no problems and the signal strength and performance is very good anywhere in my apartment. This means that the problem is not hardware related but connected to the ubuntu OS or ubuntu driver.
When I first installed ubuntu on my computer i couldn't connect at all through wifi until I saw some articles which said to create '/etc/modprobe.d/ath9k.conf' and add this line 'options ath9k nohwcrypt=1' to it. This fixed part of the problem as I can now connect/work via wifi. However the performance is still bad. I am forced to use windows most of the time as I can't connect via wifi on ubuntu unless I am in the same room as the AP(and I hate using windows...).
Please help me fix this problem.

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Noam Wajnman (wajnman-noam) said : #2
Noam Wajnman (wajnman-noam) said : #3

None of the provided links/articles solved my problem.

ubuntugaga (ubuntugaga) said : #4

I'm also running on 12.04 with an atheros AR9285, and can also testify about the poor performance.

Right now, it is only detecting one wifi spot when there are actually well over 15 available. It's really sad, but just like Noam, I have to use my old laptop running Windows to have a reliable wifi connection.

I've also looked into the recommended tips above, but they don't help.

Maybe we should open a bug for it?

ubuntugaga (ubuntugaga) said : #5

I just linked the question to a related bug which has a few other duplicates.

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