Your system information

• Steam client version (build number or date): Apr 4 2020, at 00:37:27

• Distribution (e.g. Ubuntu): Kubuntu 18.04

• Graphics driver version (run nvidia-settings):Nvidia 435.21

• Gist for SteamVR System Information:
  CPU: Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz
  GPU: NVIDIA Corporation GeForce GTX 1060 6GB/PCIe/SSE2

• Opted into Steam client beta?: [Yes/No] No

• Opted into SteamVR beta?: [Yes/No] No

• Have you checked for system updates?: [Yes/No] No

Please describe your issue in as much detail as possible:

Whenever I close SteamVR, my desktop environment crashes and I have to login again.

Steps for reproducing this issue:

1. Open SteamVR on KDE 5.12
2. Close SteamVR

EDIT: This problem does not occur on kubuntu 20.04