protonscr

dxgi.syncMode ignored ?

dxvkclosed wontfix
doitsujin/dxvk#861 · opened 2019-01-14 by pchome · updated 2019-01-14 · 2 comments · github
Ppchome 2019-01-14 github

https://github.com/doitsujin/dxvk/blob/master/src/d3d11/d3d11_options.cpp#L17 -- never used ?
https://github.com/doitsujin/dxvk/blob/master/src/d3d11/d3d11_swapchain.cpp#L707
https://github.com/doitsujin/dxvk/blob/master/src/vulkan/vulkan_presenter.cpp#L283

Looks like "Present mode" will always be VK_PRESENT_MODE_FIFO_KHR by default,
and VK_PRESENT_MODE_IMMEDIATE_KHR for dxgi.syncInterval=0.

dxgi.syncMode = 1 ignored.

Also, shouldn't DXVK force default number of dxgi.numBackBuffers to be 4 for VK_PRESENT_MODE_MAILBOX_KHR (and maybe for VK_PRESENT_MODE_IMMEDIATE_KHR), as described in #806 ?

There is indeed difference for me in DXVK_HUD=fps,frametimes d3d11-triangle.exe test.

  • default : 2200+ fps
  • dxgi.numBackBuffers = 4 : 2300+ fps

Same when I trying to force VK_PRESENT_MODE_MAILBOX_KHR.

Ddoitsujin maintainer 2019-01-14 github

The correct fix is to remove the option entirely. There's no reason for it to exist and when it was there, it didn't work as expected on anything.

Also, shouldn't DXVK force default number of dxgi.numBackBuffers to be 4 for VK_PRESENT_MODE_MAILBOX_KHR (and maybe for VK_PRESENT_MODE_IMMEDIATE_KHR), as described in #806 ?

No, DXVK (or any Vulkan application) is not supposed to guess what the window system it's running on might require. This is not a bug, and the workaround is to specify it manually in the config file when running on XWayland.

Ppchome 2019-01-14 github

Understood, thanks.

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