Hi Andriy,
Thank you for posting! I am sorry things are not working fully as expected while using your TBT4-UDZ docking station, and I would be happy to help.
A quick not, previously you mentioned:
“I already wrote to support about 4 days ago and haven’t heard anything back.”
To the best of our knowledge and ability, we are unable to find any messages from your email address within our support system.
With that said and in regard to the issue at hand, there can be several potential variables that can affect the behavior of displays connected to the TBT4-UDZ.
In regard to how the displays are physically connected to the TBT4-UDZ, previously you said:
“Two of them connected via HDMI and two other with HDMI to DisplayPort.”
The cables you have with a DisplayPort connector on one end of the cable and a HDMI connector on the opposite end of the cable are most likely ‘passive’ cables, which is most likely why the displays are not working.
To expand further, the TBT4-UDZ has two HDMI video outputs and two DisplayPort video outputs. If the DisplayPort video outputs need to be converted to a different video protocol, then an ‘Active’ cable or adapter must be used. ‘Passive’ cables or adapters are not compatible.
For your reference, a ‘passive’ adapter or cable only changes the physical connection type, it does not convert the video signal. An ‘active’ adapter or cable not only changes the physical connection type but it also actively changes the video signal from one protocol to another.
An example of an Active DisplayPort to HDMI adapter would be the Plugable DP-HDMI adapter → https://plugable.com/products/dp-hdmi
Apologies again for the frustration, and thank you for giving us the chance to help!
Bob
Plugable Technologies