This would probably indicate the laptop-switch event isn't being recognised. That would be a hardware-software problem. I've had a netbook where I could press the switch and everything would work, but closing the lid wouldn't. So would that be hardware or software ?.
You're going to have to do some more investigation - only you have access to the machine.
systemd can introduce clashes in power management with the DE, but by F29 all those should be sorted out - are you using the standard gnome DE ?. Are you using any other power manager ?.
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