I did another experiment. I've remove ehternet cable, connected WiFi to my home router. Now I could reboot as much as I want, WiFi worked, checkbox is visible and is ON inside network manager widget.
BUT, later I disabled WiFi connection, attached etherne cable, rebooted and that's it - wlan0 device missing, no WiFi checkbox! -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1585886 Title: WiFi indicator icon disappears in Ubuntu 16.04 Status in indicator-applet package in Ubuntu: Confirmed Status in network-manager package in Ubuntu: New Bug description: Dear all, Can someone confirm an occasionally missing WiFi indicator tray icon? Sometimes it happens that the icon is not displayed although the WiFi connection is working. Please see also the attached screenshot. Warmly, ~Robert To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/indicator-applet/+bug/1585886/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp