HDMI goes crazy on multiple connections through USC-C Hub

[Zorakie]

Ok, so here is a thing. I need to connect 2 external monitors. On any other laptop, I am able to connect on HDMI through onboard connector and one through USB-C dongle.

Now, I use some generic dongle/hub, HDMI, VGA, LAN, and some USB ports.

When connecting one monitor EITHER through onboard HDMI OR through dongle`s HDMI, the monitor works well. But if I try to plug in BOTH, the displays go crazy, like the system argues, which port is maped where, efectively all displays shutting of and on as the system tries to decide whare to put what, and this lasts until I disconnect one of the 2 monitors.

Now, let`s make things more interesting.

When I take a very simple USB-C to HDMI adapter, ta-daaa all monitors are simply working fine and I can use all 3 monitors.

However. It is USB-C hub! It should technically work automatically as it is a simple USB-C device. And the issue is not in the hub itself, as I do use it on my windows laptop for quite a time for 3 monitor setup.

So, any clue, what can cause this behavior?

I am not sure, what to provide, if you know about any system log/report that will be useful, I will be more than happy to find it and post it.

Thanks! :)

[QuanTrieuPCYT]

Will look into this. The laptop isn't currently with me now so I need some time