This Portable KVM Has VGA in 2025—And Actually

If you've spent any time in server rooms or data centers, you know the drill: lugging around a monitor, keyboard, and mouse to manage headless systems. Or maybe you're a sysadmin who's tired of the peripheral sprawl on your desk. Either way, portable KVM switches promise a better way—control any machine from your laptop, no extra hardware required.

The Openterface KVM-GO enters this space with something genuinely different: native VGA support. Yes, VGA. That 15-pin analog connector from 1987 that refuses to die, especially in enterprise environments. While most portable KVMs have moved on to HDMI and DisplayPort exclusively, Openterface is betting that enough people still need VGA to justify building hardware around it.

Tech reviewer apalrd got his hands on all three versions—HDMI, DisplayPort, and VGA—to see if this gamble pays off. The results? More complicated than you'd expect.

The Setup (When It Works)

The core concept is straightforward: plug the KVM into your target machine's video port (the connector's built right into the device, no cable needed), connect USB for keyboard and mouse emulation, then control everything from your laptop through Openterface's open-source software. Available for macOS (written in Swift), Linux/Windows (via QT), and Android.

The DisplayPort version performed exactly as advertised. Full BIOS access, smooth operation, minimal mouse lag. The device includes a micro SD slot that can switch between host and target, letting you flash an OS image on your laptop then boot the target machine from it—useful for rescue operations or quick installs.

One standout feature across all models: OCR text extraction. Need to copy a public key or error message from the target system? Select the text on screen and the KVM will OCR it to your clipboard. In testing, it accurately captured a SHA hash on the first try. Not groundbreaking, but genuinely helpful when you can't copy-paste the normal way.

The HDMI Problem

Here's where things get interesting. The HDMI version struggled—hard. Testing on both Kali Linux and Alpine Linux, the reviewer hit consistent EDID (Extended Display Identification Data) issues. The target systems either wouldn't detect the display at all or would crash their display servers when booting into the OS.

"I suspect something about the EDID info that the HDMI unit is sending is causing X or Wayland to crash or just not identify the display as valid," the reviewer noted while troubleshooting. BIOS access worked fine, but booting into Linux? Dead in the water.

Plot twist: the same HDMI unit worked perfectly when connected to a MacBook Pro. The macOS display preferences didn't even show a model name for the device (just a blank field where the monitor name should appear), suggesting the EDID might be malformed or incomplete. But it functioned.

This creates an awkward situation. If you're planning to use the HDMI version primarily with Linux systems—which seems likely for a tool marketed toward sysadmins and homelab enthusiasts—you might be in for frustration. The reviewer's unit may have been defective (when testing with an earlier prototype, HDMI detection worked), but it's a concerning data point.

VGA: The Reason This Exists

The VGA version is what makes this device noteworthy. As the reviewer points out, "some modern servers still use VGA, which is horrifying to me because this 15-pin D-sub is an interface from 1987, and we've had digital display outputs since 1999 when DVI came out."

Horrifying or not, VGA persists in enterprise hardware. And almost no one in the portable KVM space supports it natively. You can use adapters with other devices, but that defeats the entire point of these integrated-connector designs.

Testing proved challenging—the reviewer literally couldn't find a VGA device at home to test with in 2025. Eventually, they brought the unit to a makerspace and tested on an old Dell Optiplex running Linux. It worked without issues, though testing wasn't as thorough as with the other versions.

One physical quirk: the VGA connector partially covers the micro SD slot, making card removal awkward. Not a dealbreaker if you're not constantly swapping cards, but worth noting.

The Software Question

The app itself showed some rough edges, particularly on macOS. When swapping between different KVM units (which most users won't do, but the reviewer needed to for testing), the app wouldn't detect the new device until restarted. This becomes relevant because Openterface sells a $319 kit with all three connector types—if you're troubleshooting and want to try a different connector, you'll need to close and reopen the app.

More concerning: the paste function has no cancel button. If you accidentally paste a massive file and tell the KVM to type it out character-by-character, you're waiting until it finishes. The reviewer pasted in the entire Bee Movie script and had to sit through it typing thousands of characters before force-closing and reopening the app.

These feel like polish issues rather than fundamental problems. The software is open-source, which means the community could potentially address them. But they're friction points that'll slow you down during actual use.

The Price Context

At $119 for a single-connector kit (with cables and case) or $319 for all three, the Openterface KVM-GO sits in the middle of the portable KVM market. Budget options start around $60. Enterprise IP-based KVMs that do similar things cost $500+.

The integrated connector design is genuinely convenient—no fumbling with cables when you're in a cramped server rack. The open-source software gives you flexibility across operating systems. And if you need VGA support, this is essentially your only option at this price point.

But the HDMI reliability issues introduce real uncertainty. DisplayPort owners get a solid, functional tool. VGA users finally have native support that works. HDMI users? You might be fine, especially on macOS or Windows. Or you might be debugging EDID problems when you should be working.

Openterface is shipping the HDMI version in May, with DisplayPort and VGA arriving in April. That delayed HDMI timeline might indicate they're working through these issues. Or it might not.

For now, the Openterface KVM-GO proves that someone finally cared enough about VGA to build proper support. Whether that someone is you depends entirely on which connector you need—and how much you trust the HDMI version to work with your specific setup.

—Yuki Okonkwo