(Running Lubuntu 16.04.3 LTS)
For the last few months I've been getting annoying popups from certain activities. For example, Yakuake runs from autostart whenever I boot my PC. Now I get this popup to say it's started:
If I change a Dropbox file on another computer, I get this popup:
When I get an email, I get something like this popup:
These messages only last 3-4 seconds, but they overlay whatever you're doing, making them a nuisance.
I've used Lubuntu for years and I think they started with the 16.04.3 LTS update -- but I'm not certain. The point is, I never used to get them but I can't seem to switch them off!