In one command it kills X, frees the GPU from drivers and console, detaches the GPU from the host, starts the VM with the GPU, waits until the VM is off, reattaches the GPU to the host and starts lightdm.
* One GPU that supports UEFI and its BIOS. All GPUs from 2012 and later should support this. If the GPU does not support UEFI you may be able to make it work, but you wont see anything in the screen until the drivers inside Windows kick in.
I experienced some weird things when doing this on the display, like a corruption of the image, but seems to work fine. If you encounter anything, a reboot solved my problems.
It did not work for me, the ROM is 59KiB and it should be around 162KiB. It may work for you.
1. Execute `scripts/iommu.sh` as **root** to get the BUS ID for the GPU. Looks like `0000:06:00.0`.
2. Edit `scripts/extract-vbios-linux.sh` to your convenience. Change `videobusid=`. [Optional] Change also the location where the vBIOS will be save `VBIOS=`.
3. Make the script executable with `chmod +x scripts/extract-vbios-linux.sh`
4. Link the service to systemd: `ln -s scripts/qemu@.service /usr/lib/systemd/system/`
5. Execute the systemd unit with `sudo systemctl start qemu@extract-vbios-linux.service`. You can also do it over `ssh`. The extracted ROM will be in the root directory `/root/vBIOS.rom`
From here you are alone, I don't know how to proceed. Maybe you need to edit, maybe don't.
3. Execute `scripts/iommu.sh` as **root** to get the BUS ID for the GPU. Looks like `0000:06:00.0`.
4. Edit `scripts/extract-vbios-nvflash.sh`. Change `videobusid` with your GPU; `NVFLASH=` if you changed the location of the executable; and `VBIOS=` if you want the ROM in other place.
5. Link the service to systemd: `ln -s scripts/qemu@.service /usr/lib/systemd/system/`
6. Execute the systemd unit with `sudo systemctl start qemu@extract-vbios-nvflash.service`. You can also do it over `ssh`. The extracted ROM will be in the root directory `/root/vBIOS.rom`
[Source](https://www.youtube.com/watch?v=1IP-h9IKof0). [You can download the bios from techpowerup.com](https://www.techpowerup.com/vgabios/); if you do so, [skip to edit the vBIOS](#edit-the-vbios).
1. [Download and install GPU-Z](https://www.techpowerup.com/gpuz/).
2. [Open GPU-Z and backup the GPU BIOS](/Screenshots/vBIOS.png). Right next to the `Bios Version`; in my case `80.04.C3.00.0F`, there is an icon for backup. A file named `GK104.rom` will be created [Your file name may vary].
1. Open the vBIOS ROM (`vBIOS.rom`) in the HEX editor.
2. [After a bunch of `00` there is a `55` or `U` in HEX, delete everything before the `55`](/Screenshots/Hex vBIOS.png), and save. I strongly recommend not to overwrite the original ROM.
12. Let Windows find the drivers for the GPU (if Windows has network) or [download the updated ones from NVIDIA](https://www.nvidia.com/Download/index.aspx?lang=en-us).
Sometimes the QEMU command will just fail and the command continues and start X again.
Sometimes the QEMU command does not exit after shutting down the VM.
### Windows version
Windows 10 Pro 1709 works for me, but 1803 does not (may be the UEFI). I have heard that the 1803 version comes with a Spectre patch and the performance is pathetic.
And you must supply QEMU with the Full GPU's ROM extracted extracted using a tool called "nvagetbios" , which you can find in a package called "envytools"
