PG32UCDM -- How to disable KVM completely

[DEMinSoCAL]

New owner so still getting familiar with this monitor, but I'm having an issue with what I think is the KVM function operating when I don't want it to.  I have a PC (DisplayPort) and Mac Mini M4 (HDMI).  No USB anything is plugged into the monitor.  I use BT keyboard and mouse for both machines.  What happens is when working on PC, the screen switches to the Mac Mini all on it's own!  I can use the monitor control to switch back to DisplayPort just fine, but it happens somewhat regularly and is annoying.  

I did not see anything in the settings to actually disable the KVM.  I think it was my Mac Mini either sleeping the display or waking it and it would cause the monitor to switch to the HDMI input.

Thanks.

[Xaxxus1]

turn off auto input detection.

[DEMinSoCAL]

It already is disabled.

[Aureliannn_ROG]

Hi @DEMinSoCAL ,

Thank you for your inquiry. 

To better understand and resolve the issue you are experiencing, please provide us with the following information:

1. Firmware version: Does this issue occur on a specific firmware version? What is your current display firmware version?
2. Auto KVM setting: Does the problem occur regardless of whether you turn off or on the Auto KVM function?
3. Input source: Is your current display input source correctly selected as DisplayPort?
4. Port testing: If you try cross-testing different ports, does the problem still occur? This will help us determine if it is a problem with a specific port.
5. Display reset: We recommend that you reset the display to factory settings and then confirm whether the problem still occurs.

Please kindly confirm the above information so that we can analyze the issue.

Thank you.

[DEMinSoCAL]

Hello.  Firmware is MCM108.  The current connection configuration is DisplayPort = Windows PC, HDMI = Mac Mini M4.  Nothing else is connected to monitor except power.  NO USB. I work mainly on the Windows PC but the Mac Mini is always on.  What happens is suddenly the monitor goes black and switches to HDMI.  I know that because when I use the OSD and check inputs, it's on HDMI.  So what I did was set the Mac Mini to not go to sleep or not sleep the monitor (both are always on) and the problem has not occurred since.  So with the HDMI input on the Mac Mini turning on it's switching inputs on the monitor.  I can confirm that the "auto-input detection" is DISABLED.  So I have no idea why the monitor is switching to HDMI on it's own.

[JustViktorS]

I think I know who's the villain. Try to turn off "HDMI CEC" in System Setup section of the OSD menu

[DEMinSoCAL]

I've already got that disabled, but now I'm wondering if I disabled it before OR after I switch the Mac Mini to never to go sleep?  I'll re-enable the Mac to sleep the monitor and report back.  Thanks.