Epiphan KVM2USB 3.0 - a local KVM crash cart that runs over USB and works with any target computer OPEN BOX

This the most expensive portable KVM on amazon. The connection of the keyboard and mouse will be lost after rebooting. Or it just can't get the keyboard connection. And it can't capture screen very often. It is a very annoying and bad experience. I used the ATEN CV211 before which has bad screen capture quality. So I want to change a new one. But the most expensive price doesn't mean the best quality. I can't find more reviews or demo videos on the internet. I regret to buy this stuff so much because I waste a lot of time to test it.The test PC are Dell 990, BOX PC 3000, Optiplex 9020 and R640 and all of them have the same keyboard and mouse problem. My host laptop is Precision 7520.

Fast shipping, good seller.

I went straight for the USB 3.0 kvm to support a better video feed, and I'm really disappointed. The keyboard/mouse connection to the target is unreliable, as other users have said. With a linux target (raspberry pi 4) a bunch of usb errors appear when trying to enumerate the device, for a few minutes and then it starts working ... sometimes, the kvm hardware or software is not handling hot-plugging well. Also, the host program on Linux hasn't been updated in ages, I've tried using it with kernel 4.19 and 4.14 and it only works in 4.14. And even then it seems to crash now and then. It's incredible how much they are charging for this garbage.

I have tested this device against much cheaper competitors, but quite disappointed.First, my hope was that I can run this under Linux as advertised. But their Linux software does not work at all.So I had to revert to Windows, but even there is very sluggish and "forgets" keypresses. The device is hard to place in any server based environment, it has a very rigid USB cable and just "hangs" down. But for this price (almost TWICE of what StarTech costs) I was expecting a sleek, state of the art piece with excellent software. Big disappointment.

Host: Windows 10 Pro for Workstations Version 1909 Build 18363.836Downloaded KVMApp.Updated device to latest firmware.Video steams decently but will go dark without warning or being moved. Many machines will not recognize the USB as an input device. One machine halted anytime USB was plugged in at BIOS. Two servers recognized mouse input and enter/escape, but not alphanumeric keys.Extremely unreliable device, after 13 hours testing it I'm blown away by how unstable it is.Processed a return less than 24 hours after receiving it.

This is the only crash cart device I've found that connects to the client (controlling) computer with USB 3.0. I tried another company's USB 2.0 device, and the Epiphan blows it out of the water. It is *much* more responsive, and provides a moderately accurate view of the host computer's GUI.With the competitor's USB 2.0 unit, there was about 2 seconds latency with mouse and keyboard actions, and the video was blocky, jumpy and fuzzy, with very inaccurate colors. The Epiphan's latency, while still present, is much less noticeable. And it replicates the host's video with reasonable accuracy. It's far from a perfect replica of the host video, but it's not bad.If you only need to use console/command-line tools to control your host computers, you might be satisfied with one of the cheaper USB 2.0 crash carts. But if you're using Windows or other GUI tools on the host, I think you'll be very frustrated with anything less than the Epiphan.Despite my praise for the Epiphan, I should provide some context. It does *not* provide a pixel-to-pixel rendition of the host display. Far from it. As I understand it, all crash cart devices use frame-grab technology to translate the host video to your client machine's screen. Aliasing is inevitable. Especially noticeable is the loss of sub-pixel control, causing a sort of prismatic effect with text and line-base graphics. You would not want to engage in extended work sessions with any crash cart. You'd be far better off with a Remote Desktop or Xterm connection, if one of those could be arranged. But if it could be arranged, you wouldn't need a crash cart.The Epiphan device is expensive; there's no denying that. The others, even at half the price, aren't cheap either, and they are much less useful. If you need a crash cart, this is the one to get.