Smooth Motion conflicting with HDR

Hello,

I’m using an RTX 5070 Ti with driver 590.48 on Linux (Wayland). I’ve found a color reproduction bug when NVIDIA Smooth Motion is active.

Colors become extremely over-saturated (neon-like) only when HDR environment variables are enabled alongside Smooth Motion.

The issue occurs when these are set together:
env = PROTON_USE_NTSYNC, 1
env = PROTON_ENABLE_WAYLAND, 1
env = PROTON_ENABLE_HDR, 1
env = DXVK_HDR, 1
env = PROTON_DLSS_UPGRADE, 1
env = PROTON_NVIDIA_LIBS_NO_32BIT, 1
env = PROTON_DLSS_INDICATOR, 1
env = ENABLE_HDR_WSI, 1

If I disable Smooth Motion, colors are perfect. If I disable the HDR variables, colors are normal with smooth motion (but no HDR).

I think it’s a layer superposition problem.

System:

  • GPU: RTX 5070 Ti

  • Driver: 590.48

  • OS: CachyOS (Arch-based)

  • DE: Hyprland (Wayland)