Incorrect estimated screen refresh rate when using the vulkan driver

Is there an existing issue for this?

• This is a bug in RetroArch frontend
• I have searched the existing issues

Description

I have a monitor with a 60 Hz refresh rate and when I am using the vulkan driver, the estimated screen refresh rate in the settings menu is reporting 120 Hz:

When the video driver is set to d3d11, the estimated screen refresh rate 60 Hz:

I'm not sure if it's related, but when using vulkan and when I have the show fps toggle on, it shows 120 fps in the menu. When I start a core, the fps goes down to 60 fps during game play; however, the motion is not smooth even though the fps remains stable at 60 fps. I need to set the vsync swap interval to 2 in order to get the same level of smoothness that I do when using d3d11 with a swap interval of 1.

Expected behavior

The estimated screen refresh rate setting and the vsync swap interval should match when using d3d11 and vulkan.

Steps to reproduce the bug

1. Set video driver to vulkan.
2. Go to the output submenu in the video menu and the estimated screen refresh rate will be double the display-reported refresh rate.

Version/Commit

1.21.0 (05f94af)

Bisect Results

I don't know if this worked in a previous version.

Present in the nightly version

I don't know

Platform & operating system

Windows 11 Pro 24H2 26100.4351

Affected Cores

N/A

Environment information

Video driver: vulkan
GPU: NVIDIA RTX A500 Laptop GPU
Driver: NVIDIA RTX Driver Release 570 version 573.42

Relevant log output

https://gist.github.com/raziel711/9128809357e9cc0bebc514e05f652df0

No source file or test is named. First reproduce the issue with the Vulkan driver on the reported Windows setup, compare it with d3d11, and review the linked log; done means the estimated refresh rate, FPS display, and swap-interval behavior no longer differ unexpectedly between the drivers.