Error 12 when I virtualize Windows with Bhyve on FreeBSD 13 / 14 + pass thru of my Geforce RTX 2080 ti inside the VM


What I would like to understand is why,when I try to pass my RTX 2080 ti from FreeBSD to Windows 11,it won’t do it,causing error 12. It says that it generates a resource conflict and requires additional installation).

Now,inside it I still see the error 12 :

The device PCI\VEN_10DE&DEV_1E04&SUBSYS_250319DA&REV_A1\3&61aaa01&0&48 generates a resource conflict and requires additional installation.

I have 3 GPUS.

The ones you see below :

root@marietto-133:/usr/ports/www/chromium # lspci

00:02.0 Display controller: Intel Corporation CoffeeLake-S GT2 [UHD Graphics 630] (rev 02)

01:00.0 VGA compatible controller: NVIDIA Corporation GP106 [GeForce GTX 1060 3GB] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GP106 High Definition Audio Controller (rev a1)

02:00.0 VGA compatible controller: NVIDIA Corporation TU102 [GeForce RTX 2080 Ti] (rev a1)
02:00.1 Audio device: NVIDIA Corporation TU102 High Definition Audio Controller (rev a1)
02:00.2 USB controller: NVIDIA Corporation TU102 USB 3.1 Host Controller (rev a1)
02:00.3 Serial bus controller: NVIDIA Corporation TU102 USB Type-C UCSI Controller (rev a1)

What I do is to select (from the BIOS) the Intel or the Nvidia Geforce 1060 GPU,reserving the RTX 2080 ti to a guest os (Linux or Windows),by declaring this parameter inside the file /boot/loader.conf :

pptdevs="2/0/0 2/0/1 2/0/2 2/0/3"

Take in consideration that IT WORKS inside the Linux vm,but NOT in the Windows vm,because there are some kinds of conflicts between resources that I need to understand.

I ran msinfo32 and then I checked the resource sharing and conflicts tab to see which devices are conflicting with each other and I found something really interesting (please see the attached picture).

I’m not a developer,but I suspect that a patch is needed for bhyve. Windows needs that ACPI is enabled within Windows itself,because when I have disabled (configuring the entries below to Start 4 - disabled) the entries below :

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\ACPI Start 0
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\AcpiPmi Start 3
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\acpitime Start 3

what's happened has been a BSOD : "Unaccessible Boot Device"

I’m not sure if ACPI can be disabled in Windows without to break it irreversibly. Please give suggestions to this point. Maybe disabling ACPI in Windows 11 using the proper way,I will not get the previous,irreversible error.

Maybe I can disable ACPI between the parameters of the GPU ?

What happens,instead if I keep ACPI enabled in Windows,but disabled in bhyve ?

Windows crashed with the error “Video TDR failed” and it keeps crashing.

The other option would be to develop a patch for bhyve that fix the conflicts that are shown by Windows ?