I don’t think MST hubs have different firmwares for dealing with HDCP.

What display are you having a problem with?

Did you verify that the display doesn’t have black screen issue when connected directly (without the MST hub)?

I have a display that does go black momentarily periodically if the brightness is set over 80%. I think it’s getting old.

What chip does the CSV-7200H use? If you can get the DPCD info, it may have the information.

If it’s a Synaptics chip, then you can get some utilities in the Microsoft App Store that can get more info, backup the firmware and update the firmware (if you have an updated firmware).
https://www.synaptics.com/products/video-interface-ics

https://apps.microsoft.com/detail/9nrk6tg8vcnx?hl=en-US&gl=US
https://apps.microsoft.com/detail/9mw1dzdnkvbv?hl=en-US&gl=US
https://apps.microsoft.com/detail/9nrk6tg8vcnx?hl=en-US&gl=US
https://apps.microsoft.com/detail/9pmrbpftmtmc?hl=en-US&gl=US

Hi joevt,

I found this:

https://insights.club-3d.com/thread/flickering-and-black-screen-for-0-25s-cac-1010-club3d-displayport-to-dvi-d-hdcp/

they suggest linux, so would be cool to manage it with windows, thx. After all, I ve got no better idea about these problems and a solution. Thx!