DRI_PRIME=1 equivilant for vulkan games

[kenthinson]

Feature Request

I confirm:

• that I haven't found another request for this feature.
• that I have checked whether there are updates for my system available that
  contain this feature already.

Description

Ability to hide cards from vulkan or somehow specfiy what one should be used by the game. Similar to DRI_PRIME=1.

Justification [optional]

Example. Running a Asus tuf book with Vega / RX 560.
Doom 2016 running with open-gl mode. I can simply launch steam with DRI_PRIME=1 to set the RX 560 as the rendering card. However If I switch the game over to Vulkan mode then DRI_PRIME=1 is ignored and the game runs on the vega graphics. I'm assuming that the game can see both cards and is just selecting the incorrect one? However I have no way to confirm this.

Risks [optional]

None known.

[kenthinson]

closing as i found the Primus-VK project.

[kenthinson]

Reopening as Primus-VK seems to be a Nvidia only solution.

[kisak-valve]

Hello @kenthinson, it sounds like you're looking for DXVK_FILTER_DEVICE_NAME to limit what GPUs are used.

Otherwise, this should be a feature request for manipulating the order GPUs are listed in vkEnumeratePhysicalDevices in Vulkan's loader rather than something that should be implemented in Proton.

[kenthinson]

@kisak-valve Doom uses vulkan native not DXVK. I figured that the wine layer would be responsible for what order the graphics cards are presented to the exe no? For example maybe we dont want to change the default order for all apps just the game in question.

[jozefkucia]

You can use VK_ICD_FILENAMES, e.g. VK_ICD_FILENAMES=/usr/share/vulkan/icd.d/nvidia_icd.json.

[kisak-valve]

It should be noted that while VK_ICD_FILENAMES is effective in limiting the enumerated videocard to a driver vendor, it doesn't help with forcing the vulkan loader to pick between video cards of the same brand like the AMD RX560 / Vega in the example.

[kenthinson]

I opened a issue with the vulkan team here is the link in case anyone with the same issue happens on this via google.

KhronosGroup/Vulkan-Loader#202

[felixdoerre]

Hi @kenthinson
I don't see any reason why primus_vk should now work on an amd laptop, however I don't have any such hardware to try to understand how the amd-driver behaves and how one could get this working. The NVIDIA-Driver hack (https://github.com/felixdoerre/primus_vk/blob/master/nv_vulkan_wrapper.cpp) is obviously not needed but maybe, the AMD driver behaves correctly from the start.

[juanro49]

I have same problem. I found this tool https://github.com/aejsmith/vkdevicechooser but I have a compile error