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Long time Arch Install Wifi Issues: Atheros does not power up

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https://bbs.archlinux.org – tequa wrote:Hello,i'm not sure, whether it is the same problem for me, but i have an ath9k usb-device, too (TP-Link TL-WN722N) and it makes problems since kernel 3.4 (or at least 3.4.2 and 3.4.3).It worked fine up to kernel 3.3.*.The main problem seems to be getting an IP via dhcp (dhcpcd and dhclient always timeout). The problem can be reproduced at my notebook (also archlinux, also only with 3.4.[23]-Kernel) with the USB-Adapter, the WLAN-Chip in the notebook (intel onboard) works fine, though.Setting up WLAN with static IP works, but is not really an option.Do you have similar problems (HowTos)