Re: ath9k/AR9285 - incompatibility with bluetooth

[Dan Williams <dcbw@redhat.com>]

On Thu, 2010-01-14 at 18:49 +0000, Alberto José Rodríguez Rodríguez
wrote:
> Hellow,
> 	I have a ZOTAC MAG ION and I'm having problems with wireless
> connections
> 
> Distribution: Ubuntu 9.10
> Kernel version: 2.6.31-16
> Device: 04:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
> Problem Description:
>     - Low signal strength
>     - Cannot connect to wireless networks
> Using linux-backports-modules-karmic:
>     - Low signal strength persists
>     - Can connect to WPA networks but signal strengh is low and unstable, also when using at the same time a Bluetooth USB dongle (continuously inquiring) the wireless connection is lost.
>     - Cannot connect to WEP networks, although the WEP key is set correctly and the device is associated to the AP
> Using latest linux-wireless snapshot (20100113):
>     - Can connect to WEP networks but when I use at the same time a Bluetooth USB dongle (continuously inquiring) the speed of the wireless connection becomes very slow.
>     - Can connect to WPA networks but when I use at the same time a Bluetooth USB dongle (continuously inquiring) the wireless connection is lost.

This isn't unexpected; Bluetooth and WiFi interfere with each other
because they both use 2.4GHz.  So don't expect great performance out of
either BT or WiFi when you're using both at the same time.  Many
built-in chips have BT co-existence capability, but that only works if
both the WiFi and BT chips are built into your computer and are wired up
to talk to each other.  External USB BT or WiFi dongles almost certainly
will not have working coexistence support.

Dan