Hello @PaveFE,
I apologize for the continued frustration with the SV231QDPU34K. The steps I outlined above are a few of my maneuvers for occasional disruptions. To be certain, these steps should not be part of your normal workflow and should only be needed if there are disruptions after a hardware change or power loss. If they are needed more often then we should investigate this further.
DisplayPort technology is complex and a hardware-based KVM like the SV231QDPU34K can work very well. However, when issues occur troubleshooting can be an interesting challenge. The solution can sometimes not be very intuitive like the difference between a monitor refresh rate or an active or passive adapter.
I will be happy to investigate these issues with you. We will need to gather considerable detail to understand the devices used with the SV231QDPU34K and how they are connected. Could you provide the make and model of the monitors and computers and how each is connected to the KVM? If any adapters, converters, or converter cables are used what is the make and model of those?
If you prefer, I can create a case and contact you directly at the email used to sign up for the StarTech.com Community.
If you are ok with sharing your configuration details here we can step through on the forum.
You are also welcome to contact us directly at StarTech.com Support. Just let my support team know you posted on the StarTech.com community post #1145.
We will do our best to help get you up and running reliably.
Sincerely,