I finally found this post which outlines the issue. If you are looking for an adapter to hook your late model computer to your KVM I’m sorry to say you are probably looking at a lost cause. As far as I can tell almost no KVMs do this correctly but if you have and older graphics card it might not do the polling either so you will not notice. So unless the KVM fakes a signal to all PCs connected to it Windows will reconfigure (scramble) ALL your windows when you switch to another PC. Windows looks at the signal from your monitor to decide what can be displayed and evidently to enforce HDCP does checks for monitor changes regularly. So you must use some sort of digital to analog converter. Problem is once you install the drivers the VGA / analog signal is turned off when a digital (HDMI and/or DVI-D) monitor is connected. The issue I was trying to solve was connecting 3 monitors to a Evga GTX 760 graphics card with on of them going through a VGA KVM. So I can have it on the laptop screen or on the monitor, not both, no matter how much I fiddle with settings.Īfter trying 3 of the Startech adapters trying to sort and issue and finding the root cause is most likely a Microsoft issue, I’m updating my reviews. I was also hoping to send out from the VGA out on an old Windows XP laptop to HDMI, and while this device did work to send to the HDMI monitor, the laptop’s screen can’t display that HD resolution. I tried it out with a modern Windows 10 machine and it works just fine until I try to run my oldest software (640×480, 800×600) at which point it drops signal to the HDMI monitor.
So if you’re trying to run old software that sets a computer to a lower resolution, or if you’re running an old laptop that can’t do 1920 x 1080, it may not work fully. It seems to insist on the resolution coming into the device to be just so (I think it’s 1920 x 1080) or it won’t work.
One of the reasons I bought this was to improve my ability to integrate some legacy systems into modern setups, and it does not do a great job with that. But in that case, your machine probably has an HDMI out anyway. Works well if you’re running modern software on a modern computer and sending out to an HDMI monitor.
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