Thanks for the reply Kapu.
I'm pretty sure it's not user error (although happy to be corrected). I've been working with RF (all sorts, not just consumer grade WiFi) for years and years. I'm also a linux sys admin so no problem with the command line.
I've done a factory reset on the device. I've done a firmware restore too. I've also updated to v 1.0.6 and still have the same problems.
I've connected via the Android App, a Windows 7 Pro PC and a Mac Book (after reconfiguring ICS to work on the correct range and gateway). I've followed the set up guides listed here - https://www.wifipineapple.com/pages/setup#nano
The thing is, it runs fine for a few minutes then just seems to give up. I can send deauth packets and get my client to drop off the associated access point but only if I do it within the first few minutes. I'm sorry but I guess the title of this thread is a bit misleading as the deauth is not the only issue. Below is the email I sent to support over 2 weeks ago. To be fair, Darren did email back after a few days and request the output from some shell commands and then about a week later (after I emailed to enquire but the wait was my fault apparently as I originally replied to Darren, who the original response came from, and didn't "reply all" to copy support in) to say that the hardware looked fine and I should do a factory reset and upgrade to v 1.06 (which I did and made no difference). I emailed back on the 16th March to say that the upgrade to v 1.0.6 didn't make the issues go away and am waiting for a response.
Here's my original support email that details all the issues I have so far...
******************************************************************************************************************
<snip>
Here are the issues. Recon runs fine for a few minutes but then starts freezing at 100% when running a client + AP scan. It does this on all scan lengths. PineAP adding probed SSID but not broadcasting them. I can also create a new SSID and add it but it never gets broadcast. I've followed the you tube demo for using Recon and PineAP, performed a reset on the NANO and also performed a factory firmware reset and the problem remains. I've connected vi ICS on a win 7 laptop, via Kali live usb on a MBP, a MBP running the latest OSX (after reconfiguring ICS to give the correct IP address range and change the default GW!) and an Android Samsung Alpha phone using the WIFi Pineapple connector app. I've also connected via the WiFi management interface and get the same issue every time. I've powered the NANO from a 15000mAh pack (2.4A outputs), a 3A USB charger, A 4 Way USB power pack (with 2.4A outputs) and via the USB on a windows laptop and a MBP. All using the supplied dual head USB cable. Please see attached screenshots. Please advise..
</snip>
******************************************************************************************************************
I hope that gives a clearer view of the problems.
Thanks.