I am a newbie to Ubuntu and installed Ubuntu 16.04 in my Acer ES1-521 laptop. WiFi worked right after the installation, but now i see Wireless adapter is hard blocked.
Machine has a Qualcomm Atheros 9565 card. There is no switch to turn off/on wifi. Only the Fn + F3.
Seems the hard block started after i switched off and on bluetooth. Not sure it caused it or just a coincidence.
I had tried the following to remove hard unblock.
rfkill unblock all modprobe ath9k Bios reset (F9) - Wifi card works just fine in Windows 10 before and after bios reset
None of the above could unblock wifi.
any other suggestions please?