Re: DWA192 Network Connection Speed Slow
On Tue, 8 Mar 2016 07:14:00 +1100
Stephen Morris <samorris(a)netspace.net.au> wrote:
Hi,
I am using a dual channel Dlink DWA192 wireless USB adapter.
This adapter is supported in the kernel via the Ath9k driver, but
only the 2.4GHz band is supported, the 5 GHz band is not. Looking at
the Networkmanager connection speed statistics the speed alternates
between 135Mb/s and 1Mb/s, which on a 600Mb/s link is terrible. On
windows with the vendor supplied driver I get 565Mb/s on the 2.4GHz
band and 1.3Gb/s on the 5GHz band. How do I determine why I'm not
getting to full connection speed from the 2.4GHz band, and how do I
determine why the kernel doesn't support the 5GHz band?
I took a quick look at the kernel code. There is a switch that sets
whether the ath9k uses 2 channels, CONFIG_ATH9K_CHANNEL_CONTEXT. If
that isn't set to 2 for the kernel you are running, then you won't have
access to the two channels.
Try going to /boot and running
cat config-[for the kernel you are running] | grep -i ath9k
If it isn't set, you could compile a custom kernel to enable it.