Vulkan detects two GPU's with both x64 and i686 driver being installed

[jp7677]

Hi there,

This is a follow up from doitsujin/dxvk#1408

Both the x64 and i686 nvidia drivers seem to put an icd file into /usr/share/vulkan/icd.d/:

ls /usr/share/vulkan/icd.d/ | grep nvidia
nvidia_icd.i686.json
nvidia_icd.x86_64.json

Both files have the same content:

$ cat /usr/share/vulkan/icd.d/nvidia_icd.i686.json
{
    "file_format_version" : "1.0.0",
    "ICD": {
        "library_path": "libGLX_nvidia.so.0",
        "api_version" : "1.1.119"
    }
}
$ cat /usr/share/vulkan/icd.d/nvidia_icd.x86_64.json
{
    "file_format_version" : "1.0.0",
    "ICD": {
        "library_path": "libGLX_nvidia.so.0",
        "api_version" : "1.1.119"
    }
}

Unfortunately this make vulkan think that I have 2 GPU's:

$ vulkaninfo
Presentable Surfaces:
=====================
GPU id : 0 (GeForce GTX 1080):
GPU id : 1 (GeForce GTX 1080):

(output is truncated).

I can manually restrict vulkan to use just one icd file with setting VK_ICD_FILENAMES=/usr/share/vulkan/icd.d/nvidia_icd.x86_64.json in my environment, though it would be cool when just one icd file is present. This would also resolve at least the linked issue without having to set VK_ICD_FILENAMES.

[jp7677]

I guess the change needed would be here https://github.com/negativo17/nvidia-driver/blob/master/nvidia-driver.spec#L281

install -p -m 0644 nvidia_icd.json %{buildroot}%{_datadir}/vulkan/icd.d/nvidia_icd.%{_target_cpu}.json

should probably be

install -p -m 0644 nvidia_icd.json %{buildroot}%{_datadir}/vulkan/icd.d/