What these utilities can do will likely depend greatly on the model of computer, especially if there’s an external GPU or only the one integrated into CPU. I recall seeing free utilities for changing video settings but I don’t recall their names. I recall people finding drivers from the GPU manufacturer that can sometimes manipulate the video behavior and have much lower risk of doing damage.Ī KVM that has that integrated “dummy dongle” is the lowest risk option but also highest dollar cost. They can’t always put things back the way they should. One fix is a non-standard manipulation of the display output settings on the computer, to get this desired behavior people will modify bits of code that aren’t meant to be user accessible. I do recall seeing software fixes for this problem and some are more elegant than others. The pass-through “dummy display dongles” and the “fast switching” KVM switches are really doing the same thing, it’s just the fast switching KVM switch has the pass-through dongle integrated internally for all computers attached to it. The higher end KVM switches listen in on this serial connection, relay that to the computer, and then leave the connection in place even while switched to another computer. The delay and/or the reset of the display settings is from this serial connection being lost and then reestablished. Later on displays used a slow serial connection on one or two pins, and this carried over into DVI, HDMI, and perhaps other systems. In the early days of VGA the “headless dongles”, or whatever one might call them, would keep the connection alive by shorting pins together to communicate that a display was attached and which resolutions are supported. Most KVM switches disconnect the display completely and so when the connection is restored the computer goes through the process of establishing a new connection. What you are likely looking for is a “fast switching” KVM. There are pass-through dongles and ones that don’t for reasons of keeping a display and/or GPU alive for a “headless” server, it’s a hardware workaround to a software limitation. You can also share a further 2 USB peripherals between the 4 computers. The LED display offers an “at-a-glance” status display for easy computer activity assessment.A “dummy dongle” that passes through the video will likely solve your issue. Access up to 4 PCs or Macs from one USB mouse, USB keyboard and standard VGA monitor. The KVM switch includes a Windows and Mac based utility allowing users to select and monitor active PCs from their desktop as well as to configure the keyboard hotkeys for easy switching between computers.The KVM-0222 further supports hot-plugging for easy maintenance of computers without shutting down the KVM switch or the computer. Users simply connect the KVM switch to the USB mouse and keyboard and screen ports on each computer using the included cables.Easy to Switch between ComputersThe KVM-0222 switches between computers either through the pushbuttons located on the switch or by using keyboard hot keys. The KVM-0222 supports PC and Macintosh (MAC G3, G4, iMAC) platforms.One Keyboard, Mouse and Monitor for Two ComputersThe LevelOne KVM-0222 connects two computer systems to a single USB keyboard, USB mouse and monitor.The KVM-0222 is a Plug-and-Play KVM switch that requires no power supply. This enables users to work on one computer while simultaneously using the other computer for work or fun. Product OverviewThe KVM-0222 2-Port USB KVM Switch from LevelOne offers users with an easy to install KVM switch that can manage two computers from a single monitor, keyboard and mouse.It allows users to access, control, boot and reboot two USB-enabled computers using a single USB keyboard, mouse and monitor.Flexible Multimedia FeatureThe KVM-0222 offers users with user-programmable simultaneous or independent PC switching.
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