Upon boot, wireless connects to my Asus RT N66U correctly. Speed tests indicate 50 Mbps down and 40 Mbps up. This is expected.
Shortly after boot, the wireless will drop out, reconnect, and then be horribly slow / unstable / non-responsive. Speed tests then indicate time outs or < 5 Mbps down.
I'm on Ubuntu 14.04.
lsusb reports my WiFi device as:
Bus 003 Device 005: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n
lshw -C network shows:
*-network description: Wireless interface physical id: 1 bus info: usb@3:4 logical name: wlan0 serial: 2c:d0:5a:e2:05:e3 capabilities: ethernet physical wireless configuration: broadcast=yes driver=ath9k_htc driverversion=3.13.0-40-generic firmware=1.3 ip=192.168.1.140 link=yes multicast=yes wireless=IEEE 802.11bgn
What I've Tried
The following seems to have made no difference:
echo "options ath9k nohwcrypt=1" > /etc/modprobe.d/ath9k.conf
echo "options ath9k_htc nohwcrypt=1" > /etc/modprobe.d/ath9k_htc.conf