KVM switch causing FreeBSD 15-Release install to reset/reboot?

[Jake0162]

I've just upgraded from 14.3 --> 15.0 release. No issues with the upgrade process itself, but now I'm seeing issues when I'm switching PCs using my KVM switch(KCEVE KC-KVM204D3).
When I switch away from my FreeBSD workstation it'll cause it to reboot my workstation(FreeBSD PC).

This wasn't ever an issues before upgrading, so I'm assuming it might have something to do with moving from drm-61 to drm-66 and something breaking the gpu driver's hot-plugging.

The strangest thing is that there is nothing in '/var/log/messages', or from dmesg to indicate anything at all happening after this. It's like someone just smacked the reset switch and it's kinda driving me crazy as I often need to switch between my workstation PC and my other PCs for testing stuff bare metal.

If anyone has any insight into this or has had similar issues with their KVM switches that information would be super helpful, otherwise I'll try to update this post with my findings if I can solve the issue.

For some context my current workstation hardware:

CPU(s): 2x Intel Xeon E5-2698 v3
RAM: 256gb DDR4 ECC 2133MHz
NIC0: Broadcom NetExtreme II PCIe
NIC1: Realtek 8111H (Not in use).
GPU: RX480 8GB
USB: USB3.1 PCIe 5 port card.
PSU: SeaSonic Focus Gold 750W
Cooling: 2x 360mm rads + 8 Delta 120mm

 

[kent_dorfman766]

I've just upgraded from 14.3 --> 15.0 release. No issues with the upgrade process itself, but now I'm seeing issues when I'm switching PCs using my KVM switch(KCEVE KC-KVM204D3).
When I switch away from my FreeBSD workstation it'll cause it to reboot my workstation(FreeBSD PC).

This wasn't ever an issues before upgrading, so I'm assuming it might have something to do with moving from drm-61 to drm-66 and something breaking the gpu driver's hot-plugging.

I think you are correct in your assumptions. Have you tested the KVW while freeBSD is in text console mode, or just while running a GUI?