I'm also experiencing this issue on Debian Stretch,
wireless network adapter is 0846:9030 NetGear, Inc. WNA1100 Wireless-N
150 [Atheros AR9271]
linux-image-amd64 4.9+80
network-manager 1.6.2-3
The workaround provided above works for me:
/etc/NetworkManager/NetworkManager.conf
[device-mac-randomization]
wifi.scan-rand-mac-address=no
I hope this can be fixed soon, luckily I had another machine with a working
Internet connection, but this will be a showstopper for anyone trying Debian
for the fist time and failing to connect to the network.
