My ubuntu 14.04 is getting crusty and I don’t think that Mate helped it out greatly, but I marginally like Mate better than XFCE. However, whenever my computer wakes from suspend, my wallpaper background image is all black and kinda messed up. So I read this example of making a suspend-resume hook. And here is my own:

jreynolds@cholla /etc/pm/sleep.d 
 > cat 20-desktop 
#!/bin/bash
wallpaper="/home/jreynolds/Pictures/wallpapers/paradise-hills-01-3840x1080.jpg"
case "$1" in
sleep|hibernate)
   ;;

resume|thaw)
   pgrep mate-session \
      && Esetroot $wallpaper &
   ;;
esac

And it seems to work pretty well.