Issues with 9950X3D using QEMU KVM [solved]

So, I had my system working great for almost 2 years, and Windows 10 in a VM, with my 7950X3D.
Been able to play most games I wanted, even few with known anti-cheats that block VMs.

Yesterday, upgraded just my CPU, with an 9950X3D and then the problems started…

I tried to use my VM, without any changes. It looked fine, but I couldn’t launch any game that uses BattlEye. Service was failing to start. I tried to uninstall and re-install BE, without success.
Then I tried to remove two games that use it and re-install them, BE was failing to get installed.

Another issue I was having, was that Edge could not open most HTTPS sites. Apart from very few, all others were reporting “ERR_SSL_PROTOCOL_ERROR”. Even Bing and support.microsoft.com were doing the same.

After I spent >10 hours trying to make it work, I decided to do a fresh Windows installation.
Now, I have worse problems…

Steam works fine, until I add to my drives, drive D (where I have all my games installed). As soon as I add it and click OK, Steam crashes and it cannot be launched again. When I try, it looks like loading, I get a glimpse of my library for a second and then crashes.

Then I tried to install Escape From Tarkov, but the launcher does not work. Before anything else, I am getting “External exception 80000004” and then closes. Tried to download latest installer, the same.

Next step was to delete my VM and start over with a fresh install. Same issue.
Then I tried to install Win11, same issue.

I am pretty convinced that some of the XML settings are not working with 9950X3D, but I have no idea what. The problem is that most of these settings have been tested for months, and if I change/remove any of them, I am not sure what impact could have in performance, or worse, with anti-cheat software.

Any suggestions?

Running XML but I am doing changes to make it work.

2 Likes

Answering my own question, since I found the solution.
Long story, short, it works with Kernel 6.12.x and fails with 6.13.x.
It has been reported as a bug here.

4 Likes

Thank you for providing an answer for everyone who might struggle with it as well.

3 Likes

I don’t see this on my 9950x3d system…. Could it be motherboard dependant?

I have a proart b650.

Could be, I haven’t read the whole analysis of the bug in Kernel 6.13.
However, today I received an update, 6.13.7, and looks it has been fixed, so it depends on the version too.

I have only 6.13.5 and upwards so I guess it’s possible that’s why I haven’t seen the problem.

All my VMs work perfectly with VFIO and Looking Glass.

1 Like