Your system information

• Steam client version (build number or date): 1538437695
• Distribution (e.g. Ubuntu): Gentoo
• Graphics driver version (run nvidia-settings): Nvidia 396.54.06
• Gist for SteamVR System Information: https://gist.github.com/ryao/fe8d42b52fe3bb9df3f8ccdce8451cac
• Opted into Steam client beta?: [Yes/No] Yes
• Opted into SteamVR beta?: [Yes/No] No
• Have you checked for system updates?: [Yes/No] Yes

Please describe your issue in as much detail as possible:

Describe what you expected should happen and what did happen. Please link any large code pastes as a Github Gist
I am unable to exit VR from inside the VR headset. I should have been able to exit. Coincidentially, I cannot start VR by pressing the button on the side of the headset either.

Steps for reproducing this issue:

1. Start VR.
2. Put on headset
3. Try to exit VR and get an error dialog on the desktop from kioslave saying "Could not find any application or handler for vrmonitor://quit"