[Bug 202445] amdgpu/dc: framerate dropping below adaptive sync range causes screen flickering

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=202445

--- Comment #10 from Clément Guérin (libcg at 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.

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