Solved KAMRUI GK3 Plus Mini PC dummys up after monitor is switched to other input.

lgrant

lgrant

I am running FreeBSD 14.1-RELEASE on a KAMRUI GK3 Plus Mini PC (https://www.newegg.com/p/2SW-003F-00036?Item=9SIB74MK4W5126), command line only. My monitor has two inputs (like most monitors), and when I switch over to the other input, and then switch back, it seems like the KAMRUI does not want to talk to me till I reboot it. I get the impression that this may be a hardware issue, rather than an operating system issue.

Has anyone else run into this?
 
Yes, with these:

www.gigaipc.com

QBiX-EHLA6412-A1 | Fanless industrial system with Intel® Celeron® J6412 Processor

Industrial system with Intel® Celeron® J6412 Processor/ Lockable DC Connector/ 2 x HDMI / 2 x LAN Ports/ 1 x Combo Audio Jack (Headphone & Headset)
www.gigaipc.com www.gigaipc.com

Both on FreeBSD live image and OpenBSD (installed) and even the BIOS screens.

Sometimes unplugging and replugging the HDMI seems to work but usually not.

I have two of these machines and they both show the same behaviour.

If I force the screen to stop auto-source switching and to stay on the source I select that sometimes helps.

But definitely same as you - seems hardware-related. Sometimes even a reboot doesn’t work - there seems to be a brief window where the monitor “catches” the signal and decides to select that PC as the input.

Samsung monitor.
 
EDID and handshaking stuff.

This is very common in my world and not just Arm systems.

If HDMI is not plugged into an active screen at bootup it will not work. That is my rule of thumb.

Long Live VGA..... It just works.
 
Since a lot of these small PCs are designed to bolt on to the back of a monitor, they probably figured that dealing with the monitor disconnecting and reconnecting was an unnecessary expense.
 
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