Using options iwlwifi 11n_disable=1 to turn off n networking hasn't worked. It has successfully turned off n (leaving abg), but I still get the deep sleep problem. I'll try turning off IPv6. I've also ordered the following USB adaptor: Edimax EW-7811UN Wireless 802.11b/g/n 150Mbps Nano USB Adaptor which people seem to be using successfully with RaspberryPI.
Using options iwlwifi 11n_disable=1 to turn off n networking hasn't worked. It has successfully turned off n (leaving abg), but I still get the deep sleep problem. I'll try turning off IPv6. I've also ordered the following USB adaptor: Edimax EW-7811UN Wireless 802.11b/g/n 150Mbps Nano USB Adaptor which people seem to be using successfully with RaspberryPI.