Install xdotool from the repository with sudo apt install xdotool if not already installed. Make a note of the keyboard shortcut you use for "Show Desktop." It is under Window Manager > Keyboard. Mine is ctrl+alt+d. Create the following two scripts:
~$ cat bin/graphics-workaround #!/bin/bash export DISPLAY=:0.0 export XAUTHORITY=/home/brock/.Xauthority xdotool key ctrl+alt+d xdotool key ctrl+alt+d ~$ cat /lib/systemd/system-sleep/graphics-workaround #!/bin/sh if [ $1 = post ] && [ $2 = suspend ]; then /home/brock/bin/graphics-workaround fi Edit export XAUTHORITY=/home/brock/.Xauthority to correspond to your home directory path. Also edit /home/brock/bin/graphics-workaround to the path to your script. Don't forget to mark both scripts as executable with chmod +x script-name You can also create a systemd service if you prefer that method. I've tested both methods, and both work. Here is more information setting a command or script to run upon resume from suspend. https://askubuntu.com/questions/661715/make-a-script-start-after-suspend-in-ubuntu-15-04-systemd#answer-661747 Feel free to email me if you have any difficulty in getting it set up.
