Just thought i'd share my experience with this card
We have also been experiencing issues with this particular WiFi Card.
But we don't believe it's a software issue. We run a corporate network using Dell E7440s and E7420s (approx 300 - 400 laptops), all using the same wifi card; and so far we've had about 4 - 5 of these reporting issues with the wifi not connecting to our network.
After repeated rebuilds (we use a standard image build through out our office), the problem does not go away. Even with updates to the latest software drivers / and using factory default image. The problem seems to happen more often when starting up from a low power state. We have our systems disable the wifi card on the laptop when it is docked at a docking station. When the unit is undocked the wifi should reinitialize. It does to some degree, it would turn on, but refuse to detect wifi networks. or is unable to connect to the wifi network. It's almost like it is unable to broadcast out to handshake with our AP. We would have to turn it off completely with the wifi switch on the laptop. or restart the computer for the card to reinitialize correctly. We would also experience the wifi card suddenly drop connections, and unable to reconnect.
We concluded it had to be a manufacturing fault with a small percentage of them, otherwise we'd be having issues with all our laptops in the office. We replaced the suspect wifi cards with another 7260 card, or a different intel model N-6200. Now everything works (both on 5Ghz and 2.4Ghz).
