i'm running ubuntu 16.04
Recently on the network manager a message was shown like Wifi hardware switch disabled
and i tried to restart network-manager by sudo service network-manager restart
when it restarted wifi is working but now the icon disappeared from system tray.
i have tried few commands wich is in the other post but it didn't fixed my issue
rfkill unblock all
rfkill list
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
25: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
rfkill list all