The wifi in my hp probook 4540s with ubuntu 14.04 not working with message "Device not ready" I tried $ rfkill list that showed me

phy0: Wireless LAN

Soft blocked: no

Hard blocked: no

I tried rfkill unblock all and rebooted but the problem is the same.

I tried solution in this link but that made the wifi disappear from the list so i had to undo it.

Finally i opened from live CD ubuntu 14.04 and the wifi works so no hardware problems.

Edit: I followed that link and the result is here.

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