They don't suspend by default. I don't use KDE any longer so maybe it's changed, but you just needed to right click on the activity in the activity panel and th

They don't suspend by default. I don't use KDE any longer so maybe it's changed, but you just needed to right click on the activity in the activity panel and there should be a menu item to suspend the whole activity. It's really a non-obvious feature.. :) It's very handy and it's the main thing I miss from KDE b/c you can have more stuff "running" on a wimpy computer. I'd usually have a whole activity for some project I only touch once a week and it'd just sits suspended in the background till I needed it again