Wgpu-rs: nouveau support?

[donpdonp]

im doing a hello-world with bevy and this is what I get when running it:

thread 'main' panicked at 'Unable to find a GPU! Make sure you have installed required drivers!'

from lspci:

    Subsystem: eVga.com. Corp. GK104 [GeForce GTX 660 Ti] [3842:3660]
    Kernel driver in use: nouveau
    Kernel modules: nvidiafb, nouveau

the backtrace shows the error from bevy_wgpu/src/wgpu_renderer.rs

request_adapter(&wgpu::RequestAdapterOptions {
  power_preference: wgpu::PowerPreference::HighPerformance,
  compatible_surface: None,
})
.await
.expect("Unable to find a GPU! Make sure you have installed required drivers!");

is using the nouveau drive supported?

[Abendstolz]

Does nouveau support Vulkan?

Can you check with

ls /usr/share/vulkan/icd.d/

?

The last info I had (albeit from 2019) was that nouveau doesn't support Vulkan but the devs were working on it - wgpu currently has no OpenGL backend, so Vulkan is a must on Linux.

[donpdonp]

after googling around it does appear that nouveau is opengl only. it'd be helpful if the error said "Make sure you have installed required vulkan drivers!" and for the wgpu-rs README to say something about vulkan being a requirement. When I read "It's designed to be suitable for general purpose graphics and computation needs of Rust community." I would think that would run on nearly any graphics card/driver.

not sure what this shows, but here is the ls output you asked for. thanks for the help!

$ ls /usr/share/vulkan/icd.d/
intel_icd.i686.json  intel_icd.x86_64.json  radeon_icd.i686.json  radeon_icd.x86_64.json

[Systemcluster]

A platform support matrix is shown in the https://github.com/gfx-rs/wgpu repo. You can track the OpenGL backend progress in https://github.com/gfx-rs/wgpu/issues/450, @zicklag has made some great advances there recently.