[ath9k-devel] Dlink DIR-655 firmware upgrade broke 11n

[Luis R. Rodriguez <lrodriguez@atheros.com>]

On Sun, Oct 19, 2008 at 08:31:13PM -0700, Kevin Mitchell wrote:
> So upgrading to the 1.21 (9/30/2008) firmware on the DIR-655 router
> allowed my AR5418 client to associate 11n at the speeds I was seeing
> before. I am again using the current wireless-testing kernel as of
> writing.
> 
> On client:
> $ iperf -c 192.168.1.100
> ------------------------------------------------------------
> Client connecting to 192.168.1.100, TCP port 5001
> TCP window size: 16.0 KByte (default)
> ------------------------------------------------------------
> [  3] local 192.168.1.102 port 50197 connected with 192.168.1.100 port 5001
> [ ID] Interval       Transfer     Bandwidth
> [  3]  0.0-10.1 sec  35.3 MBytes  29.2 Mbits/sec
> 
> On remote machine w/ gigabit to router:
> $ iperf -c 192.168.1.102
> ------------------------------------------------------------
> Client connecting to 192.168.1.102, TCP port 5001
> TCP window size: 16.0 KByte (default)
> ------------------------------------------------------------
> [  3] local 192.168.1.100 port 55712 connected with 192.168.1.102 port 5001
> [ ID] Interval       Transfer     Bandwidth
> [  3]  0.0-10.0 sec  47.9 MBytes  40.0 Mbits/sec
> 
> Actually this is a bit faster than I was seeing before. I'm guessing
> there have been some improvements in the time that I have been
> 11nless. Keep up the good work guys!

Give this patch a try as well:

http://www.kernel.org/pub/linux/kernel/people/mcgrof/patches/mac80211/aggrv10.patch

  Luis