Follow my directions in my last post above. Hopefully we can make some kind of progress without all the information we need.
I am going to re-edit the above commands.
Run the following commands:
sudo systemctl stop NetworkManager sleep 2 sudo modprobe -r dell_laptop sleep 2 sudo rfkill unblock wifi sleep 2 sudo systemctl start NetworkManager sleep 2 sudo modprobe ath9k sleep 2 sudo rfkill unblock wifi nmcli r wifi off sleep 2 nmcli r wifi on
Then test your wifi.
If your wifi is not working put your laptop into suspend.
Wait 30 seconds then bring laptop out of suspend and test your wifi again.
lspci -knnvvv | grep -i net
sudo rfkill list all
If the laptop freezes you may have to do a hard power down.
Please post all input/outputs and report any changes you notice.