Godot: Graphic artifacts in Linux with an NVIDIA Optimus setup

[Rubonnek]

Operating system or device - Godot version:
Godot master branch 3bea3256f5def126b2b6d639ed70c4ddc3990344

Issue description:
Running the material_testers demo in Arch Linux will show the following artifacts:

Using the Intel video card:

00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
        Subsystem: Lenovo Device [17aa:3977]
        Kernel driver in use: i915

OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile 
OpenGL core profile version string: 4.2 (Core Profile) Mesa 17.1.6
OpenGL core profile shading language version string: 4.20
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 17.1.6
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.0 Mesa 17.1.6
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00
OpenGL ES profile extensions:

Using the discrete video card with proprietary driver:

01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF108M [GeForce GT 630M] [10de:0de9] (rev ff)
        Kernel modules: nouveau, nvidia_drm, nvidia

OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GT 640M LE/PCIe/SSE2
OpenGL core profile version string: 4.5.0 NVIDIA 384.59
OpenGL core profile shading language version string: 4.50 NVIDIA
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 4.5.0 NVIDIA 384.59
OpenGL shading language version string: 4.50 NVIDIA
OpenGL context flags: (none)
OpenGL profile mask: (none)
OpenGL extensions:

I expected to see what's shown in the patreon video

Steps to reproduce:
Run the material_testers demo

[HummusSamurai]

10149, #10292, #10253, https://github.com/godotengine/godot/issues/10216

It's been confirmed, but the lead dev is currently prioritising bugs from oldest to newest (or so I understand), so might need a couple more days.

[Rubonnek]

@HummusSamurai Thanks for pointing it out. I was just searching now and stumbled upon some of those issues you mentioned. This seems like a duplicate now. The only difference being the hardware and the fact that I'm getting the grid-like artifact plus the metallic texture not getting rendered properly like in #10292 but both at the same time as can be seen in the first picture above. I have not been able to find a screenshot with those two problems at the same time in a previous issue so far.

[maxim-sheronov]

Hi. I want to just confirm this issue. On Arch linux with Nvidia Gtx-970 and on Windows 10 with Gtx-660-Ti

[vnen]

This is the same issue as #9525. Closing as duplicate.