the issue is known an being tracked on bug #860485, it started with the default being wrong but seems there is other issues leading to the setting not working as it should
could those who have the issue set "org.gnome.settings- daemon.plugins.power sleep-inactive-ac-timeout" to 0 manually using "gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive- ac-timeout 0" and see if you still get the bug? Setting the wrong value seems to work for some -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/864479 Title: System goes to hibernate or suspend even when set to "Don't suspend" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/864479/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs