Re: GPU Passthrough on FreeBSD 14.3 (AMD Radeon RX 6900 XT and Windows 10 Pro)

I've recorded a video where I demo all of this, I'll be uploading it to my YouTube channel in less than an hour. stay tuned!

Jonathan Vasquez
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-------- Original Message --------
On Wednesday, 09/17/25 at 21:44 Tomek CEDRO <tomek@cedro.info> wrote:
On Thu, Sep 18, 2025 at 3:03 AM Jonathan Vasquez <jon@xyinn.org> wrote:
> - CD Projekt / Red <3.  They've done an excellent job with GOG and their games. I'm all about that DRM Offline Gaming lifestyle lol.

Yup GOG rulez! :-)

> - Check out the first remark. Basically I'm passing in both the integrated and the dedicated card (I disabled the integrated card because I need to pass everything in that Bus if I want to use the mobo's USB/Sound stack which happens to be on there as well). I then connect my monitors HDMI cable directly to the dedicated card. So no RDP/VNC. It almost feels like I didn't even have FreeBSD installed lol. when bhyve boots up the monitor receives the signal automatically. I'm passing my KVM into the VM through the USB as well so my keyboard/mouse/sound also get passed into the VM. My server is running headless (I connect over SSH) so it doesn't need any graphics. However, the machine does have output from both cards at boot time and early on the FreeBSD boot process, it's only once it starts too boot that the video driver no longer sends anything to the cards and allows those devices to be passed through later on. So if there was an issue at boot time, I'll still be able to administer the machine. It's my home server.

Aaah, mystery solved, its a headless machine :-) I would need to
launch bhyve from my main workstation and then go back to that
workstation so this is a different setup :-)

Maybe I could use onboard Intel and NV for bhyve, but its Ultra9 CPU
so DRM does not work here yet.. and there are not much PCI-E ports on
modern mobo to add small GTX1030 or something like this.. and probably
basic gpu vendor should be different from GPU dedicated for bhyve so
it is not blocked by the kernel driver etc etc etc :-P

> - These instructions won't work for Intel/NVIDIA because they some different requirements and configuration options from what Corvin mentioned in his talk. I know some people had to patch the kernel so have some sort of KVM signature implemented or the NVIDIA driver wouldn't work. I'm not sure if that's still the case. For AMD none of that was required. It just works assuming the system is configured correctly it seems.

ACK :-) I switched back from AMD to NVIDIA after pretty decent amdgpu
card was not working reliably even for the basic desktop tasks so I
will stick to nvidia :-P

--
CeDeROM, SQ7MHZ, http://www.tomek.cedro.info