I have run into this problem as well. The "inactive" in "Turn screen off when inactive for" is a bit misleading: it's not directly about the user being inactive.
For example: Playing an HTML5-YouTube Video in Firefox will delay the turning off of the screen until the video is finished playing. (This is nice, because you don't have to bump the mouse periodically if you're watching a long video.) However, this is not the behavior when playing a Flash-Video in Firefox. In that case, the screen will start turning off when the set timer is expired. My speculation is that Firefox takes some kind of "lock" and prevents Unity from turning off the screen but the Flash-Plugin does not (or Firefox doesn't in that case?) I suspect that after being suspended and resumed a couple of times something goes wrong with this feature (until reboot.) Some application (Firefox in my case probably) does not properly release the "lock" and the screen always stays on. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1594989 Title: Turn off screen after n minutes does not work in Ubuntu 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1594989/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
