Your system information

• Steam client version (build number or date): Dec 20 2019, at 23:41:30
• Distribution (e.g. Ubuntu): Arch Linux with KDE/Plasma5 (non-wayland)
• Opted into Steam client beta?: [Yes/No] Yes
• Have you checked for system updates?: [Yes/No] Yes

Please describe your issue in as much detail as possible:

When the Steam client is running, but no games are being played, Steam will still inhibit power management:

# From journalctl:
Dec 28 12:31:29 cypherArchDsk org_kde_powerdevil[1411]: powerdevil: Scheduling inhibition from ":1.16" "My SDL application" with cookie 25 and reason "Playing a game"

This occurs even if the system has been cleanly rebooted and no games have been played since.

This appears to be a regression of #5532

Steps for reproducing this issue:

1. Start the Steam client
2. Check journalctl for indications that power management is inhibited (powerdevil messages in this case)
3. Sleep, screensaver, and other power management features are non-functional.