I am using a Netgear N150 WNA1100 USB Adapter. The network driver is: ath9k_htc.

When I use Ubuntu 12.04 my wireless connection is much slower than when I use the WNA1100 with my Windows 7 installation on the same machine.

I have been researching this and the most common reason for this seems to be related to power management. However for me this is off by default.

I had entered a bunch of different commands and, at one stage, I got it to work at full power. But then I rebooted the machine and it went back to slow again.

After entering the different commands I was afraid that I may have messed something up, so I performed a fresh install of Ubuntu. I still have the same problem. My wireless connection is still much slower when using Ubuntu than when using Windows 7.

I am not sure what other info could help...


Ok, I have made live usb from the iso file I used to install Ubuntu on this pc, and ran it on my laptop. Still the same problem. However la[top works grand on cable.

I suppose this means that my wireless adapter or network driver can be eliminated as root of the problem..

So maybe to do with router itself? I use ZyXEL P-660HW-D1

  • degraded signal should not be a problem, cause it works perfect on my windows 7 installation on the same machine. Yes same problem after reinstalling. I only reinstalled just in case I messed something up while trying to repair :) – vgaldikas May 8 '12 at 23:39
  • yes this is the exact one – vgaldikas May 8 '12 at 23:59
  • try this link --- ubuntuforums.org/showthread.php?t=1840001 --- it might be able to help. – czifro May 9 '12 at 1:12
  • no thats not problem. Althought reports only 1Mbps like described in that thread, when i had it fixed somehow it was exceeding that limit, so wouldnt have anything to do with that. As a matter of fact I only get like ~32Kpbs (max speed that mozilla showed when I attempted to download chrome.) – vgaldikas May 9 '12 at 1:38
  • PS... MAybe look at it this way.. I did maybe 5-10 things that time I got fixed.. What could it possible have been that I done that would reverse to original state?? – vgaldikas May 9 '12 at 1:50

Did you consult the following logs:



Do you see any useful information in any of them?

What happens if you run this command:

sudo bash -x /usr/lib/pm-utils/power.d/wireless true


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