Your system information

• Steam client version (build number or date): Nov 14 2019
• Distribution (e.g. Ubuntu): Manjaro 5.3.11-1
• Opted into Steam client beta?: Yes/No, tried both
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

When Steam is running, my system refuses to shut monitor off, go into standby, or sleep. Monitor may switch off for >5 sec. but quickly reactivates.

Steps for reproducing this issue:

1. Start Steam
2. Wait for screen shutdown to occur (it never does.)