There is only one more thing that seems obviously abnormal (although recommended *sometimes* in some specific situations). That is blacklisting of 'hp-wmi'.
Please un-blacklist it for a test -
Then retry the physical switch or the Fn key combination whatever you have to enable wireless.
sudo sed -i 's:blacklist hp-wmi:# &:' etc/modprobe.d/blacklist.conf
sudo modprobe -v hp-wmi
Also, are you dual booting with Windows or is it Ubuntu-only from the beginning. If dual booting, does it work in windows?