Your system information

• Steam client version (build number or date):
• Distribution (e.g. Ubuntu): Manjaro
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes
• Steam Logs: steam-logs.tar.gz
• GPU: Nvidia

Please describe your issue in as much detail as possible:

With the Windowed option disabled, Steam Big Picture Mode should start in full-screen mode. Instead, it is opening in windowed mode. See screenshot below.

To solve, toggle the Windowed option to enabled and then back to disabled. That results in full screen mode, but the problem repeats on every startup.

Steps for reproducing this issue:

1. Enable Big Picture Mode.
2. Enable Run Steam on Startup.
3. Ensure Windowed mode for Big Picture Mode is disabled.
4. Reboot.
5. Steam opens in Big Picture Mode with windows.

Screenshot