Comment 8 for bug 1757375

I can also reproduce this on both of my computers running Xubuntu 19.04, a desktop and a laptop.

Just to be extra clear on what the issue is:

If the computer is left idle for 10 minutes, the screen locks. When 15 minutes have passed, it should suspend, but it never does. I unlock the screen to investigate why, and find that there is a prompt window asking my password in order to allow the system to suspend.

What usually happens as a consequence:

I fall asleep with the laptop still running, and on the next day the thing is powered off with only 1% of battery power. It stayed ON all night.