After a world update I couldn’t start my wlan-device. I always got:
„Operation not possible due to RF-kill“
I did:
# rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
But I wasn’t able to unblock my device from the command line using rfkill unblock 0.
After a while I figured out that updating conman (to version 1.15) changed /var/lib/connman/settings like this:
[WiFi]
Enable=false
I set it to true and it worked again:)