I have the exact same problem as the OP and TimRonald. I have a Lenovo Thinkpad Yoga S1 with Intel AC 7260. I live in Japan and have an NEC WR8700N wireless router (with latest firmware) and all the devices here at home (desktop with Broadcom wireless built into Asus motherboard, Fujitsu notebook with Qualcomm Atheros wireless, Galaxy Nexus, Nexus 7, Ipod touch) work perfectly with it and suffer from no disconnections at all. Only my Lenovo with the Intel card suffers from disconnections with the default gateway not being found. I've played around with my router settings and what's unstable are:
- 802.11N 5.2ghz 300mbps
- 802.11N 5.2ghz 150mbps
- 802.11N 2.4ghz 300mbps
What's stable are:
- 802.11N 2.4ghz 150mbps
- 802.11G 2.4ghz 54mbps
- All of the above when HT mode is set to dsabled (which reduces the speed to 54mbps)
The drivers I've tried so far are: 16.0, 16.1, 16.5, 16.6, 16.8 (Dell and Intel), and the latest, 16.10. I've experimented with power settings (as well as disabling discover.exe/deleting EMC Storage Connector which was preinstalled in my Lenovo notebook), but to no avail. I remember having a similar problem with an old Alienware M14X which had the Intel 6205 card in it, before I sold it. So I hope that Intel comes out with a newer driver than 16.10 really soon because I don't want to keep my Lenovo crippled in wireless speed forever. And I'm not really in the mood to spend more cash on a new router with the possibility the my Intel wireless card will still suffer from disconnects.