add layer env var to hide present wait ext

[brain-anti-freeze]

This adds a workaround for #1592 which removes the VkPhysicalDevicePresentWaitFeaturesKHR extension in the layer if the environment variable GAMESCOPE_WSI_HIDE_PRESENT_WAIT_EXT is set. This resolves the current freezing issue on nVidia in dx12 (without having to set VKD3D_DISABLE_EXTENSIONS), dx11 (without having to patch DXVK not to use the extension) and in native vulkan games.

[matte-schwartz]

this seems to be working well for me so far, haven't run into any freezing yet.

[tlneondo]

Patched the latest fedora 41 gamescope and it looks like this fixed my issues there as well.

Definitely completely unrelated but now i'm seeing the HDR test patterns in BG3 not showing up when using a controller, probably a BG3 or nvidia bug.

[tlneondo]

Now I have a confirmed issue, trying to use Reshade with the RenoDX addon, which modifies games to output in real HDR (IE not fancy tonemapping) causes crashes for me in both Prey & Metaphor. Getting DXGI_ERROR_DEVICE_RESET errors.

[matte-schwartz]

@tlneondo Unless it's only an issue introduced with this PR, you should file a new report for that

[mindset-tk]

This works fantastically. Any chance of it being merged?

[Dannflower]

I'll preface this by saying it's entirely possible I'm seeing a different issue, but it sure looks the same to me.

I've been experiencing these stuck frames in Overwatch 2 (dx11) on Fedora 41 both when running with and without gamescope. I figured I'd give this patch a shot to see if it was a viable workaround and built the patch into 3.16.1 and verified via the logs that the env var was taking effect.

Unfortunately, I'm continuing to see the stuck frame + audio still playing issue. The only fix is for me to alt + tab or do some other action that causes the game window to come in and out of focus, at which point the rendering resumes as normal. The only thing I've found that seems to help prevent this is having something else running in the background, i.e. a video in a web browser that's forcing the screen to be redrawn.