Ever since upgrading my laptop's wireless card, I've been experiencing random disconnects, and it won't reconnect unless I reboot the machine. As a fairly seasoned Linux user, I've tried unloading/reloading the ath9k driver, restarting networkmanager and whatnot but to no avail; rebooting is the ONLY solution. The wireless card uses the Atheros AR9223 chipset (powered by ath9k driver) and I'm running Arch Linux with the latest kernel (2.6.3.