Valve Basestations 2.0 not properly working with SteamVR

I am trying to setup SteamVR to work on Ubuntu 16.04 with two Valve Basestations 2.0 and a HTC Vive tracker.

Currently, the problem that I’m experiencing is that it looks like only one basestation at a time is working:

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As a consequence the Vive tracker is correctly tracked just for a short period of time (after which SteamVR complains about room setup) and its position in the room overview jumps randomly.

I’d be very glad if someone could explain me what is happening and how to fix the problem.

Sorry for providing so little information, but I don’t know where to start. If you can tell me which additional info to provide I’m more than available to do so.

Thanks.