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0e1f616
(Get the code!)
Same as comment #52 and #53, while it used to be just once in a while, since a few weeks, it's now _every_ single time that my laptop resumes.
There are many similar bugs but with probably different causes. So to be clear here is the symptoms I see much more recently since a few weeks (on 16.04): after resume, only a couple of wifi networks will be listed at most, and never the one I use.
This workaround does work (to get nm-applet list all the networks again):
sudo service network-manager restart
These things do _not_ work:
* restarting nm-applet
* disabling/enabling the wifi from the hardware key
* trying to unblock the wifi in software (via rfkill), it's not even marked as disabled anyway.