No go for my testing inside a Linux Mint 22.1 VM. Fully updated, and passing in both 3/0/0 and 3/0/1 for my AMD Radeon card. I was able to extract some of the "dmesg" and "eglinfo" output. Running "glxinfo" also showed that the OpenGL renderer was set to llvmpipe, so software rendering :(. "lspci -k" detected it and showed that it was using the "amdgpu" kernel driver. Since I'm using vm-bhyve atm I didn't test this with the dumped rom, just directly passing them through. I've uploaded some of the logs here for now in case anyone wants to take a glance at them:
https://xyinn.org/freebsd/files/gpu_pass/2025-08-25/ Jonathan Vasquez PGP: 34DA 858C 1447 509E C77A D49F FB85 90B7 C4CA 5279 Sent with ProtonMail Secure Email On Monday, August 25th, 2025 at 14:37, Robert Cocker <[email protected]> wrote: > Hey group has bhvye core dev baked out an update for this > > Robert > --------------------------------------------------------------- > > From: [email protected] > <[email protected]> on behalf of Jonathan Vasquez > <[email protected]> > Sent: Monday, August 25, 2025 11:35:31 AM > To: Jonathan Vasquez <[email protected]> > Cc: Stephan Althaus <[email protected]>; > [email protected] <[email protected]> > Subject: Re: GPU Passthrough on FreeBSD 14.3 (AMD Radeon RX 6900 XT and > Windows 10 Pro) > > I was able to get a fresh Win 10 Pro VM running through vm-bhyve but no > progress. Still same Code 43 error as before. I wasn't able to figure out how > to pass the rom=bios.rom through vm-bhyve, I didn't see anything about it in > the config.sample file and I also tried to bypass that by adding it in > bhyve_options but no go, the VM wouldn't even start if I did that. I see > there is a "bhyve_devices" that contains all of the slot devices but I don't > see that as an adjustable variable based on the config.sample info. I've > pasted my current vm-bhyve template below. My next test is to try the same > thing inside a Linux guest to see what happens. > > ---------------- > > loader="uefi" > cpu="4" > cpu_sockets="1" > cpu_cores="4" > cpu_threads="1" > memory="16G" > wired_memory="yes" > > utctime="no" > ahci_device_limit="8" > > disk0_type="nvme" > disk0_name="disk0.img" > > network0_type="e1000" > network0_switch="public" > > passthru0="3/0/0=2:0" > passthru1="3/0/1=2:1" > > #bhyve_options="-s 2:0,passthru,3/0/0,rom=bios.rom" > > # Using RDP post-install. > graphics="no" > graphics_port="5900" > graphics_listen="0.0.0.0" > graphics_res="1920x1080" > graphics_wait="yes" > > xhci_mouse="yes" > uuid="535d54b5-81cb-11f0-93a2-98b78501bda8" network0_mac="58:9c:fc:04:5a:eb" > > ---------------- > > Jonathan Vasquez > PGP: 34DA 858C 1447 509E C77A D49F FB85 90B7 C4CA 5279 > Sent with ProtonMail Secure Email > > On Monday, August 25th, 2025 at 11:05, Jonathan Vasquez <[email protected]> > wrote: > >> Unfortunately I don't have an intel machine with an available PCIe slot. >> However I'm trying another thing which is to passthrough the card to a Linux >> guest. I need to run more experiments but a preliminary boot of a Linux Mint >> ISO did show the AMD Radeon RX 6900 XT card in lspci and showed that it was >> using the amdgpu driver. I then did a basic glxgears and it opened up in >> my VNC window and showed the FPS counter at over 2000 fps. The only issue I >> noticed was when shutting down the live CD environment there were amdgpu >> failure messages where it was failing to write something to it. I'm >> currently redoing my "basic bhyve script" and moving it over to "vm-bhyve" >> since it seems a lot of people are using that instead of the more manual >> approach. This should hopefully help simplify things for debugging. If the >> card works on Linux via passthrough this would also be useful info and can >> allow me to see the performance of Cyperpunk 2077, and some other games >> (even if I'm not getting 100% of the card's performance). >> >> Jonathan Vasquez >> PGP: 34DA 858C 1447 509E C77A D49F FB85 90B7 C4CA 5279 >> Sent with ProtonMail Secure Email >> >> On Monday, August 25th, 2025 at 11:00, Stephan Althaus >> <[email protected]> wrote: >> >>> On 8/25/25 16:56, Jonathan Vasquez wrote: >>> >>>> Hey Stephan, >>>> >>>> Yup, I've tried passing both 3/0/0 and 3/0/1 and no go, and I also make >>>> sure to reboot the host in between runs due to the amd hardware issue. I >>>> don't believe 3/0/1 is necessary though based on the examples by Corvin in >>>> his talk. He only passed in 3/0/0 (I'm guessing his card also has a 3/0/1 >>>> function that he isn't using since that's the audio channel). >>>> >>>> Jonathan Vasquez >>>> PGP: 34DA 858C 1447 509E C77A D49F FB85 90B7 C4CA 5279 >>>> Sent with ProtonMail Secure Email >>>> >>>> On Monday, August 25th, 2025 at 10:52, Stephan Althaus >>>> [<[email protected]>](mailto:[email protected]) >>>> wrote: >>>> >>>>> On 8/25/25 16:47, Stephan Althaus wrote: >>>>> >>>>>> On 8/24/25 23:58, Jonathan Vasquez wrote: >>>>>> >>>>>>> Hey all, >>>>>>> >>>>>>> I've been experimenting with trying to get my server's dedicated AMD >>>>>>> Radeon RX 6900 XT working on a bhyve Windows 10 Pro client for gaming >>>>>>> purposes. I've been reading a bunch of blog posts, sites, files, and >>>>>>> videos (thanks Corvin) to try and piece things together. I've been able >>>>>>> to get the VM to recognize the card, but still stuck on the Code 43 >>>>>>> issue (with or without using the vBIOS I've extracted from my dedicated >>>>>>> card and also ensuring any options needed to be on in the UEFI settings >>>>>>> are enabled). This machine is running on an AMD Ryzen 9 7950X 16-Core >>>>>>> Processor, so it's a full AMD setup, no Intel stuff. It technically >>>>>>> should be relatively "easy" to get AMD working from what I've read >>>>>>> (excluding the known AMD Hardware reset issue). I've documented >>>>>>> everything I've done so far, and will be documenting more and >>>>>>> simplifying the instructions as I make progress. Please let me know if >>>>>>> you see any thing weird or anything I could try based on what I've >>>>>>> rewritten. I'll try to give it a go and provide feedback. Thank you! >>>>>>> >>>>>>> https://xyinn.org/blog/freebsd/freebsd_bhyve_gpu_passthrough_amd >>>>>>> >>>>>>> Jonathan Vasquez >>>>>>> PGP: 34DA 858C 1447 509E C77A D49F FB85 90B7 C4CA 5279 >>>>>>> Sent with ProtonMail Secure Email >>>>>> >>>>>> Hi! >>>>>> >>>>>> i have a AMD RX6400 GPU setup running on 14.2 with win10 guest, host is >>>>>> a intel system. >>>>>> >>>>>> i think you have to passthrough the 3/0/1 device as well! >>>>>> >>>>>> The bios.rom is extracted from this card in place ? >>>>>> >>>>>> Regards, >>>>>> Stephan >>>>> >>>>> Ah, and be shure to reboot the whole setup, inclusive host, for every new >>>>> test-case, >>>>> at least as long at is not guaranteed that we can live without.. >>>>> >>>>> Regars, >>>>> Stephan >>> >>> Hi! >>> >>> My only next assumption would be that this only does not work on AMD host. >>> >>> You don't have an intel system to test, you would havedone it, if so.. (?) >>> >>> Stephan
