No fast forward in the sdl2 video driver when Vsync is turned on

[anyputer]

First and foremost consider this:

• Only RetroArch bugs should be filed here. Not core bugs or game bugs
• This is not a forum or a help section, this is strictly developer oriented

Description

No fast forward in the sdl2 video driver when Vsync is enabled.
There is working slow-motion though.

Expected behavior

Fast forward in the sdl2 video driver even if Vsync is on

Actual behavior

No fast forward in the sdl2 video driver when Vsync is on

Steps to reproduce the bug

1. Turn on the sdl2 video driver and turn on an compatible menu driver ( rgui )
2. Try to fastforward like you normally would

Bisect Results

This was always the case.

Version/Commit

You can find this information under Information/System Information

• RetroArch: 1.6.7

Environment information

• OS: Windows 10

[orbea]

Is there any reason you are using the SDL driver? I understand its mostly there as a last resort and the other drivers should be much better supported.

[anyputer]

Yes, it runs "alot better" than Vulkan or OpenGL. The others seem to also work okay, but SDL doesn't have weird resize issues for one. I made this topic an few months ago:
https://forums.libretro.com/t/libretro-cores-are-choppy-while-their-standalone-versions-are-not/12052

[orbea]

Well that is unfortunate, I wish I could offer something more helpful. :( The SDL driver has been neglected and is missing features like this because its often inferior to the other video drivers, but I guess that is not always true...

[anyputer]

Well luckily on this PC it isn't more or less the case but on my other two laptops, I'm pretty sure it still is.
EDIT: SDL is still smoother for me...

[anyputer]

It turns out that turning off Vsync works.

[orbea]

@hyarsan I can not reproduce this with SDL-2.0.9, fast forward works with and without vsync. Can you reproduce this still?