Losing keyboard after waking from hibernation.

Schub

2025年10月28日 21:14

Generally everything works great, the keyboard switches computers like a champ and everything, but I have two issues.  This is with a HDK402-M24-USBK.

----- Problem 1 -----
If I put a Windows computer to hibernation and immediately switch to another computer two things seem to happen…

1- the computer immediately wakes back up, I'm curious if the KVM is keeping it alive emulating a keyboard or mouse.
2- when I switch back to the computer my keyboard doesn't work unless I unplug it and plug it back in again.  
 

After I turned off the ability for all my peripherals to wake the computer up (powercfg /devicedisablewake), this stopped happening.  I have to turn the computer back on with the power button on the chasis (which is my preference, anyway), but the keyboard works properly after I do.  I would consider this an acceptable solution except Windows like to turn device waking back on all the time, so it'd be nice if the KVM handled this better.
 

----- Problem 2 -----

This is very minor, but prevents everything from feeling perfect:

I have two computers ("computer-A" and “computer-B” that share a big-monitor through the KVM, and a little-monitor that is plugged only into computer-B (so I can always keep an eye on Slack).

If I have computer-A focused and turn it off, my big-monitor will turn off as it has no signal.  The little-monitor continues to show what it was showing from computer-B.  Everything is fine at this point.

But, when I turn computer-A back on it will power up big-monitor.  While the big-monitor is powering on I can see computer-B moving everything to the little monitor as if it just noticed big-monitor was gone.  

When the big monitor finishes starting up everything seems to get moved back to the right place on computer-B, though.  So, it seems like EDID emulation gets a little messy while the monitor is coming back on.

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• 正式なコメント

  

  TESmart.02

  2025年10月29日 01:40

  Dear Schub,

  Thank you for your detailed feedback regarding the HDK402-M24 KVM.

  1. About the keyboard not working and the PC waking from hibernation:
  This behavior occurs because the KVM’s HID emulation (keyboard/mouse signals) may keep the PC awake or trigger a wake event.
  Disabling device wake (powercfg /devicedisablewake) is an effective solution, and you can also turn off “Allow this device to wake the computer” for your keyboard and mouse in Device Manager. We’ve shared this case with our R&D team for possible firmware optimization.

  2. About the display layout shifting when the monitor powers back on:
  This happens because when the monitor is powering up, its EDID (Extended Display Identification Data) signal becomes temporarily unavailable. During this short period, the computer connected to the KVM may think the monitor has been disconnected, causing windows to move to the remaining active display. Once the monitor finishes powering up and the EDID signal is restored, the display layout returns to normal.

  Thank you again for sharing your experience.

  Best regards,

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