> Are you getting same problem when connecting your computer without EVGA DisplayPort MST hub?
> Does it happen when connecting with straight cables?
I don't get the problem with 1 external monitor, either with or without the hub (when a single monitor is connected to the hub, everything works fine). It's only with 2 external monitors attached when I get problems. Unfortunately this laptop only has a single DP port, so I cannot test with 2 external monitors attached directly.
> If you already tested the graphics controller with an earlier driver version and latest, BIOS update, this might be compatibility issue with the EVGA DisplayPort MST hub.
The reason I don't think this is an issue with the hub is that restarting (powering off/on) the hub does not solve the problems, but restarting the laptop does solve the problems for a while.