LFC (Low Framerate Compensation) fails below minimum VRR range — Adaptive Sync oscillates between min and max

[LaggyKar]

Same thing:

Gsync compatible VRR - Low Framerate Compensation (LFC) transition not seamless, unlike on Windows

My Lenovo G27q-20, which is a Gsync compatible certified device, has a VRR range of 48-165Hz. When frame rate drops below 48fps, there is a noticeable stutter event happening. I can reproduce this in Strange Brigade native Vulkan (Proton) by increasing render resolution scale to 200%, so I can drop below 48fps in some scenes with my RTX 3060. On Windows, this transition is seamless, i.e. there is no noticeable stutter event. MangoHUD frame time graph shows flat line for frame render times, so t…

Wildly fluctuating refresh rate and flicker at low framerates

When I run an application at a low framerate, the refresh rate (as reported by the monitor OSD) fluctuates wildly. I’m testing with Ōkami HD (which is locked at 30 FPS), mpv (playing 24 or 25 FPS videos) and “strangle glxgears -fullscreen”. For Ōkami, the refresh rate constantly jumps between 48 and 80 Hz (never a multiple of 30). For mpv, the refresh rate fumps around all over the place, even to the monitors maximum refresh rate. I’m pretty sure it used to hold the refresh rate fairly steady a…

580 release feedback & discussion

We have below bugs filed already for tracking purpose. 5507242 The Finals - game freeze with specified Ray Tracing - RTXGI and Effect settings on 3060 Mobile with driver 570.153.02 5374195 Issues with Low Framerate Compensation (LFC) when using Gsync compatible Variable Refresh Rate (VRR)