Hello @Nickson72, please opt into SteamVR's beta branch and retest. This issue should already be resolved in the 1.9 beta (https://github.com/ValveSoftware/SteamVR-for-Linux/issues/270#issuecomment-556460963).
Under the 1.9.10 it works without flaw.
Sorry, I didn't notice there is "beta" under the "development release" :-)
Now I can use Unreal Engine in VR on linux, which is awesome and makes me happy! Thank you!
Nothing extracted yet.
Describe the bug
When I try to enter pairing mode blank window is opened. There is no text or buttons.
To Reproduce
Steps to reproduce the behavior:
Expected behavior
There should be describing text and two buttons
System Information
Screenshots

Additional context
Using 4K monitor
Note: Commenters who are also experiencing this issue are encouraged to include the "System Information" section in their replies.