Wireless Randomly Disconnects

I have this laptop

Amazon.com: VIZIO Thin and Light CT14-A1 14-Inch Laptop: Computers & Accessories

It has an atheros wireless card and the kernel loaded the ath9k driver for it. It is a dual band and it connects to my dual band router on both bands. On both of them, there are disconnections. They happen randomly and the nmapplet tries to get them back but takes a long time to map them before it reconnects. Disabling networking and re-enabling it brings back the connection but eventually, it disconnects again. It disconnects faster from the 5 GHZ band than the 2.4 GHZ band. I tried checking dmesg for any hints and it says that it disconnected with “Reason 2.” I have also tried changing the speed at which it receives data and also followed instructions into installing wicd to see if it had to do with the nmapplet. So far, this seems to me like a driver issue, but I do not know how to address it or what I can try to fix it.

Thank you

On 09/07/2012 10:36 AM, anditosan wrote:
>
> I have this laptop
>
> ‘Amazon.com: VIZIO Thin and Light CT14-A1 14-Inch Laptop: Computers &
> Accessories’ (http://tinyurl.com/cqrzpnm)
>
> It has an atheros wireless card and the kernel loaded the ath9k driver
> for it. It is a dual band and it connects to my dual band router on both
> bands. On both of them, there are disconnections. They happen randomly
> and the nmapplet tries to get them back but takes a long time to map
> them before it reconnects. Disabling networking and re-enabling it
> brings back the connection but eventually, it disconnects again. It
> disconnects faster from the 5 GHZ band than the 2.4 GHZ band. I tried
> checking dmesg for any hints and it says that it disconnected with
> “Reason 2.” I have also tried changing the speed at which it receives
> data and also followed instructions into installing wicd to see if it
> had to do with the nmapplet. So far, this seems to me like a driver
> issue, but I do not know how to address it or what I can try to fix it.

Reason 2 means “Previous authentications no longer valid”.

What is the Atheros model as shown by the ‘/sbin/lspci -nnv’ command. You only
need to show the stanza for the wifi card. What encryption are you using?

What is the make and model of the Access Point? What are the 2.4 and 5 GHz
settings? Can you disable 802.11n mode? Does that help? Does it help if you only
connect to one band and not both? The system will only use one anyway.