I have some Dell Latitude ST Windows 7 tablets and I am having major problems getting them to stay connected to wifi. They have the Dell wireless branded 1535C pci-e half minicard, which is atheros based and is running the only and latest driver I can find (126.96.36.199)
The devices connect to wifi but stop working after about 30-60 seconds and you sometimes have to completely reboot the tablet to get it to connect again. Basically you notice network activity stops and you get a limited conectivity exclaimation mark on the wireless icon in the systray.
Cleanair 3502i AP + some 1142N
3750G PoE Switches
WISM1 running 188.8.131.52
At the moment I have gone back to a simple WPA2 AES PSK wlan. It was the same with 802.1x authentication.
This device is connecting flawlessly on my Netgear router at home which is a WPA2 AES dual band 2.4 5ghz 802.11n.
Any ideas would be good.