I left my lenovo in office and after i returned from lunch, i did not have network access. Turns out that my friend had accidentally pushed the network access button, which is located at the right of the computer, maybe you should check if your laptop have it.

Yes I have such button but it doesn't work. I tried it after suspend but wifi was still off.

so wifi works before suspend?

why not try to restart and see if it still works

if the problem only occurs after reboot, it might be the fact that you computer doesn't support it.

e.g. :http://www.ubuntu.com/certification/hardware/201605-22283/

note that hibernate is not supported.

I'm on Samsung ativ book 4 not Lenovo.
Before suspend WiFi works. When I wake computer from suspend it's not working. I need to restart system to get it back to working again.

I found out that "nmcli nm sleep false" could help but when I try that I get error:

Error: Object 'nm' is unknown, try 'nmcli help'.

Anyone knows how to solve this? I'm still can't get network manager to work after suspend. Restarting it don't work.