IOGEAR 2-Port USB DVI Cable KVM Switch - 1920x1200 60Hz - Remote Push Button Switching - Plug n Play - Win, Linux, Mac, Sun - GCS922U

This is the 2nd one of these I have purchased. They work exactly as designed. Just be careful to connect the keyboard and mouse to the correct ports on the device. Much older KVM's that I have owned used a keyboard entry to switch between computers rather than the separate wired switch that this unit uses. The keyboard approach was more convenient but that is a minor quibble.

This KVM switch functions well, no surprises besides the one meter (short) computer cables. I especially like the EDID capture feature, which prevents the video cards from resetting to VGA-unrotated when they aren't driving the screen. I run two screens turned sideways for editing (and comparing) page-format content, this GC932UB feeds the left "editing" screen.The right screen is driven by a cheap two-input "BolAAzul DVI Switcher" (also from Amazon) which does NOT capture EDID. When IOGEAR sells an EDID-capture equivalent, I will buy it. Both computers have older Radeon dual port R7 450 video cards, with Displayport outputs converted to DVI with FEMORO DP-to-DVI dongles (also from Amazon). I've also tested the setup with much older nVidia dual-DVI cards (which draw way too much power).But what's my beef about short cables?I sometimes pull the computers out (on a roller platform) to work on them; if the KVM is on the bench-top (with cables running down the back), the computers can't roll out far. My bench-top would be a litter of cables, the GC932UB status lights would be behind the screens, and the dust would grow to bunny size.Instead, I bolted a one foot length of 2x4 /beneath/ my workbench, above the computers and to the right of my leg well, and attached the GC932UB vertically to that board with zip-ties. The USB connections and remote cable hang downwards, and feed through a loose Velcro tie hanging from a large eye-screw on the bottom of the board. The DVI and KVM cables also loop through the Velcro tie, with a large bend radius to protect the cables, see the first photo.The second photo shows the desktop and the bottoms of my "tops-together" rotated screens. The remote button for the GC932UB is velcro-taped to the monitor stand on the left, the remote button for the BolAAzul right-screen switch velcro-taped to the right. (question for IOGEAR - why does a push-button switch need a four-conductor plug? A two-conductor plug would be cheaper to manufacture and much easier to repair).The third photo shows the tangle of wires from the GC932UB to the left screen and mouse/keyboard and speakers, forked power cord with USB monitoring to the Tripp Lite UPS, MANY ethernet cables, etc. The fourth photo is the same from a different perspective.I hope the GC932UB remains trouble-free for decades, like the ancient Antec computer cases with their third generation of motherboards and sixth generation of storage drives. The best computer hardware should demand no more attention than my office chair.(BTW, I'm a freelance electronics engineer, one of the "elizabeth statice" team, and my linux machines are "gate" and "ohm" for logic design and analog design respectively. nanometers to terameters, femtowatts to gigawatts)

Regarding: GCS1944; Sorry if TLDR;[UPDATE 2021.09.14] - GXS24KIT (rackmount kit)I obtained this rack kit item to add on my GCS1944. The width of each ear is actually 2 7/8 inches, which is good, and thankfully they are not a full 3 inches as specified on their web site. After adding the ears to the GCS1994, the full width of the switch is now just a hair under 19 inches, which should work out perfectly for me to add this KVM switch to a rack.[ORIGINAL REVIEW, minus rackmount references]Overall, it seems to work, with caveats.I don't believe that DP was designed with KVMs in mind. The port switching transitions involving DP sources take longer, and IOGear's product doesn't seem to add performance benefits on that front. The ConnectPro brand boasts faster transitions (and some amount of built-in EDID transition support), but you might have other issues with their KVM products, and they cost more and are backordered, so I picked up the GCS1944 for now.With most DP-KVMs, there are port transition issues that arise (resolution/window positioning/non-waking). Supposedly upcoming Windows 10 updates may address these to some extent, but it may not be exactly perfect from what I've read. I don't know that the updates will be able to address the non-waking monitor issues. I can't speak to a Linux system experience with this KVM currently.Details on my GCS1944 assessment follow.-----GENERAL PERFORMANCE:My systems that have any DP source output take from about 15 to 20 seconds to transition (KVM/Audio/USB). The IOGear support staff will see those timings as normal. My systems connected with only HDMI or DVI sources generally transition for me within 8 seconds.-----OTHER ISSUES (not including slow transitions):1) [Windows] Improper resolution upon waking;2) [Windows] Window Re-positioning upon waking;3) Monitor doesn't wake at all;- SEE 'TIPS FOR TRANSITION' NEAR THE END OF THIS POST ON RESOLVING THESE ISSUES-----GCS1944 items to note:-My firmware is newer than what is available online for this model. Mine came with v1.1.102, online only has 101. The support staff eventually stated that mine was a "firmware we are testing," and another stated it as "shipping firmware only"... which seems rather odd to not provide the firmware online as well if it's shipping with the product. One of them actually stated "I wouldn't recommend using yet"... even though they are shipping with the product? Another said I should just stick with 102. There seems to be no way to "backup" the existing firmware. Then it seems that in the world of KVM manufacturers, there is an "aversion" to publishing all the different firmware one could potentially use, well noted with ConnectPro customers for example.-My system performs more in line with the comparable ATEN CS1944DP documentation, which I believe is mostly the exact same hardware. I'm not sure if this is a result of the 102 firmware, but the HSM-[Q] command works on mine for Monitor Re-detection, which is not documented in the current GCS1944 pdf, not sure if that works with 101 firmware. Also, quick port pressing moves over ALL items (kvm+audio+usb) by default, as described in the ATEN documentation, where the GCS1944 documentation states that it will only move the KVM over. Although I see you can manually toggle that change that with [HSM]+[S]. If I could backup/restore the 102 version, I would try 101 perhaps to see if there were any performance benefits, but I would be concerned if the monitor re-detection option is missing.-Online specs describe the GCS1944 as being 13.9 inches wide, this is wrong. It could be a simple typo, as the ATEN equivalent documentation states 13.19 inches, which is the more accurate item dimension.-----Details on my setup and related GCS1944 experience so far:-Currently using older 1080p monitors, 2 matching model ViewSonic monitors with DVI connections using DP-to-DVI active adapters from the KVM. It works fine, no loss of clarity.Whenever the source is straight DP to the KVM, I'm more likely to experience issues. If I use HDMI or DVI adapters to DP (both Active), any issues are far more rare. Although I've been planning to update my monitors, I wonder how newer monitors with DP ports could impact performance.-Using wired mouse and keyboard at this time.-Some of my systems with DP sources (but not all) occasionally fail to wake, or wake with reduced resolution settings. This happened so often from a GTX-1660 Super card, that I ended up switching that connection to the DVI output instead (with VisionTek DVI-to-DP) to go along with an existing HDMI out, and now the transition for the 2 monitors for that system occurs in about 8 seconds (as opposed to 20 seconds before), and has no need to run PW or MK for window positioning (see 'TIPS' below), although I think I had non-waking issue once. On an older laptop with docking station and 2 DP outs, lots of issues. I'm concerned about how the GTX-1660 Super card (w/up to date drivers) will perform in the future should I need the DP port again for higher resolutions.-Perhaps IOGear/ATEN can come up with some newer firmware that will allow for faster DP transitions. As it is, they should post more firmware options online, even beta firmware, as one size may not fit all. When I mentioned the transition delays up to 20 seconds to tech support, this was not surprising to them. Another option could be adding a software agent to the host computer that could be triggered upon the KVM USB activation, although I'd think they could design ways to store monitor profiles on the KVM itself, and just invoke the profiles via hotkey commands.-----AUDIO:I'm using a line mixer to feed from the computer audio outputs, so I haven't been concerned as much about running the audio through the KVM up to this point.I only use the microphone with one system, so that is plugged in directly to that system's front interface.-----Tech Support: As was stated appropriately elsewhere, regardless of the medium you use to communicate with, many among the IOGear support staff seem highly "peevish." Not all of them are this way however.-----TIPS for TRANSITION ISSUES (mostly when straight DP-to-KVM sources are involved):--- Resolution issues:I've encountered resolution issues occasionally on some of my systems with DP sources. As to WHY, I believe this could be related to varying monitor configurations defined in the Windows registry, and Windows may use the wrong entry sometimes. Search for posts related to:HKLM\System\CurrentControlSet\Control\GraphicsDrivers\ConfigurationOutside of the registry editing (which I haven't tried yet), I've had some success using the KVM hotkeys ([HSM]+[Q]+[<port #>]+[ENTER]) to re-detect the monitors to return to the proper resolution.--- Window Positioning:Consider running 'PersistentWindows' (now on v 5.7); or MonitorKeeper. I suggest running them "as administrator". Both Free! For Win7 systems, PW has done better for me.I also have DisplayFusion, which allows you to save/restore window positions.However with DF, on restoring, the focus won't realign the same, and I believe it restores previously minimized windows.I believe PW can also save/restore snapshots, haven't tried it yet. But I still like DF for other dual display purposes. But with PW, I haven't really needed to save/restore so far, it does well without.--- Monitor Not Waking- try these commands before resetting the display cable:* Restart Video Driver: [CTRL]+[SHIFT]+[WIN]+[B] -Windows 10/11 only* KVM hotkey re-detect: [HSM]+[Q]+[port #]+[ENTER] -If supported by KVM firmware* Display Mode Selection: -Windows only; [WIN]+[P], then select something other than Extend (like 'Duplicate'); then invoke Win+P again, reset to 'Extend'; This works on Win7 as well!You may lose window positioning with this command, but it should at least wake the monitor.This last option may be the most reliable means to re-awaken the monitor outside of unplugging/re-plugging in the cable .-Question: Will 'always-active' DDC-EDID phantom connectors help the resolve DP EDID non-waking issues? Not a cheap add-on, and there are not many options out there. The related technology is far from perfect at this time from what I've read.CONCLUSION: I'm making do with the GCS1944 for now, I hope it will serve me for a fair amount of time.