Windows 10 VM freezes when connecting through RDP

carlosmarchi

Hi everyone!

I'm new to this forum as a subscriber, but I have been following the project for quite some time and I have a couple of XCP-ngs deployed, so stable and reliable that I don't usually even remember they exist. Last week I have deployed a new one to use as Homelab but I'm facing an odd issue.

It's a XCP-ng 8.2.1, fully updated, and XOA Community also fully updated.

When deploying a Windows 10 VM, everything works perfectly fine, I can access the VM using RDP, the console in XOA also works. Then when I install XCP-ng Guest Tools, it breaks the RDP connection. I can still connect, but the screen freezes after a few seconds, sometimes almost a minute. If I check the console, the VM is still running, I can login, the apps are still open. I can connecto to RDP again, but the same behavior repeats (screen freezes and RDP connection is dropped). Exactly the same happens with Citrix Guest Tools.

It's local environment, so no routing or firewall rules involved. It's a consumer grade equipment (Ryzen 5700G), but similar to something I have already used in the past. I have already tried to enable/disable viridian, enable/disable iommu, enable/disable C-States, enable/disable SR-IOV, switch the network card (E1000/RTL8139).

No erros in Windows Event Viewer.

Any tips where else I could try to look to debug this?

Thank you,
Carlos

carlosmarchi

Just to give some closure that might help others, the issue was indeed realted to Networking.

I'm running the 8.2.1-test3 because I've started with a motherboard that has a RTL8125B NIC. Tried to switch to 8.3-alpha witht he same result, switched back to 8.2.1.-test3 and got an Intel 82574L NIC, now everything is working perfectly fine. The network speed of all VMs has actually increased significantly (this was another issue with the RTL8125B).

olivierlambert

Hi,

I think you can't have VM console while using RDP, or something like that. Would it explain your issue?

carlosmarchi

@olivierlambert I thought that at first, but then I did the following test:
Rebooted the VM, never touched the console tab, not even to check the boot status, connected through RDP and the same happened (screen frozen after a few seconds, ~1 minute). It seems that the more I move around the RDP screen (i.e. more traffic to update the screen), the quicker it frozen.

carlosmarchi

Just to give some closure that might help others, the issue was indeed realted to Networking.

I'm running the 8.2.1-test3 because I've started with a motherboard that has a RTL8125B NIC. Tried to switch to 8.3-alpha witht he same result, switched back to 8.2.1.-test3 and got an Intel 82574L NIC, now everything is working perfectly fine. The network speed of all VMs has actually increased significantly (this was another issue with the RTL8125B).

olivierlambert

Ah great news! Thanks a lot for the feedback: it's really important to come back to tell when it works, as you said, it helps a lot the whole community!