Re: No wireless connections after sleep/suspend
This technique sometimes, but not always works. We are going to add a file that tells the system that we have a module (a.k.a. driver) that we want to explicitly unload on suspend and reload on resume. The driver we'll unload and reload is your wireless driver iwlwifi. Let's use the text editor gedit to write a file. Since it's a location owned by root, we'll need to temporarily gain administrative privileges with sudo:
Add one line:
sudo gedit /etc/pm/config.d/config
Proofread carefully, save and close gedit. Reboot.
How does it work now?
"Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.