https://bugzilla.kernel.org/show_bug.cgi?id=202445
--- Comment #10 from Clément Guérin (libcg@protonmail.com) --- I did some more testing today, using my monitor OSD to determine if freesync is active. None of the Steam Play games I own work with freesync, the refresh rate stays at 144Hz. It looks like freesync simply doesn't work with wine. That includes: - Alan Wake (DX9 -> OpenGL) - DOOM (OpenGL) - Fallout: New Vegas (DX9 -> OpenGL) - Trackmania Stadium² (DX11 -> OpenGL)
Native games do seem to work, and I'm observing flickering with all of them. Including: - Getting Over It - Kerbal Space Program - Night in the Woods - Rocket League - Unigine Valley - VVVVVV
In the case of KSP, I'm seeing flickering even though the framerate floats around 80-90fps. Disabling VSYNC makes the flickering mostly disappear, but it's still visible when microstuttering occurs. The monitor OSD displays a wildly varying refresh rate with VSYNC ON, but seems rather stable with VSYNC OFF.