I'm having trouble with the PCI networking card on a new ZaReason desktop, an AR5008 by Atheros. The card can connect to a router, though it disconnects after a few minutes. It then takes several minutes to reconnect, after which it will repeat disconnecting and reconnecting.

I've tried installing and enabling MadWifi, though the symptoms remain.

Thanks in advance,

Ubuntu 10.04
Kernel Linux 2.6.32-22-generic
Memory 1.9 GiB
Intel Core2 Quad Q9400 @2.66GHz