I think there is a problem between using PRIME Synchronization (I use a laptop) and the v-sync mode of Vulkan (by using VK_PRESENT_MODE_FIFO_KHR as far as I understand: https://github.com/SaschaWillems/Vulkan/blob/master/base/VulkanSwapChain.hpp#L279 ). Reproduction steps: Install the latest NVIDI…

I’m seeing this as well when I’m running anything with wine. Is there any movement on this? Is there a known driver version I can downgrade to or something?

Still seeing this with the latest driver 440.66.08 with vulkan 1.2.136 and Gnome 3.36.1 Vsync works perfectly, even games using intervals 1->4 limited down the FPS However huge freezing when alt-tabing or switching workspaces still. Screen continually flashes for a while until the switching comple…

It is being actively worked on. I don’t have a date when it will be fixed by. I will update when I have more information.

Well… updating the xserver-xorg-* (xorg-server) to version newer than 1.20.6-1 version is possible to workaround it using the PRIME Render Offload configuration ( PRIME - ArchWiki ). Well… if you suffer screen tearing because you don’t have a compositor, I would suggest using picom compositor ( GitHub …

Hi all, This issue has been fixed with the latest Vulkan Developer Beta Driver 440.66.11 available here . It is part of these fixes: Fixed several synchronization bugs that could momentarily lock up the X server when moving/resizing/focusing OpenGL and Vulkan windows when PRIME Sync is enabled [L…

Yeah! Finally fixed! Is there a need to upgrade the xorg for a version newer than 1.20.6-1 for using these drivers? I want to go back to Debian stable and Debian stable uses xserver-xorg- * version 1.20.4. An observation is that the vkcube ( Debian -- File list of package vulkan-tools/sid/i386 ) suden…

Yeah! It seems that the problem above does not occure when I lauch a Vulkan application on a pure X (using “nvidia-xrun vkcube”, for example [ nvidia-xrun - ArchWiki ] ) without a windows manager like Xfwm4 and here the synchronization is perfect.

Just given the 440.66.11 release a test on Arch Linux through the nvidia-vulkan-dkms package, working a lot better now. There is a slight period of freezing where Gnome seems to think the application has crashed giving the force quit/wait dialog, alt-tabbing again once this displays resumes the win…

@RenanWP right, as you observed, regular PRIME synchronization doesn’t require a patched Xorg. I wasn’t able to observe the FPS spikes you mentioned. even with the window stopped Do you mean when the window is not being dragged around? Are you observing that the framerate goes above the monito…

Hangs/Freezes when Vulkan v-sync (VK_PRESENT_MODE_FIFO_KHR) is enabled

Graphics / Linux Linux

wpierce April 24, 2020, 11:45pm 25

Hi all,

This issue has been fixed with the latest Vulkan Developer Beta Driver 440.66.11 available here.
It is part of these fixes:

Fixed several synchronization bugs that could momentarily lock up the X server when moving/resizing/focusing OpenGL and Vulkan windows when PRIME Sync is enabled [Linux]

I will let you know when the fix reaches stable drivers.

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Hangs/Freezes when Vulkan v-sync (VK_PRESENT_MODE_FIFO_KHR) is enabled

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