egl-wayland
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HDR colors are washed out
With KDE 6 you can enable HDR for a display. If you do this on a display connected to an Nvidia GPU, the colors will be washed out, desaturated.
I have originally worked around this by connecting my HDR display to the AMD iGPU, and the colors were fine. Then, after a recent kernel update, the colors became washed out on AMD in the same way as on Nvidia. I believe the reason for this breakage is described here: https://gitlab.freedesktop.org/drm/amd/-/issues/3079#note_2339644
Is this a known issue in the Nvidia driver that is being worked on?
I am using nvidia 550.67.
Relevant drm_info data:
│ ├───Connector 2
│ │ ├───Type: DisplayPort
│ │ └───Properties
│ │ ├───"CRTC_ID" (atomic): object CRTC = 55
│ │ ├───"Colorspace": enum {Default, BT2020_RGB, BT2020_YCC} = BT2020_RGB
│ │ ├───"HDR_OUTPUT_METADATA": blob = 117
│ │ │ ├───Type: Static Metadata Type 1
│ │ │ ├───EOTF: SMPTE ST 2084 (PQ)
│ │ │ ├───Display primaries:
│ │ │ │ ├───Red: (0.6777, 0.3145)
│ │ │ │ ├───Green: (0.2715, 0.6328)
│ │ │ │ └───Blue: (0.1484, 0.0557)
│ │ │ ├───White point: (0.3135, 0.3291)
│ │ │ ├───Max display mastering luminance: 456 cd/m²
│ │ │ ├───Min display mastering luminance: 0.0673 cd/m²
│ │ │ ├───Max content light level: 456 cd/m²
│ │ │ └───Max frame average light level: 456 cd/m²
└───Planes
├───Plane 3
│ └───Properties
│ ├───"type" (immutable): enum {Overlay, Primary, Cursor} = Primary
│ ├───"FB_ID" (atomic): object framebuffer = 114
│ │ ├───Object ID: 114
│ │ ├───Size: 3840x2160
│ │ ├───Format: ABGR2101010 (0x30334241)
│ │ ├───Modifier: NVIDIA_BLOCK_LINEAR_2D(h=5, k=6, g=2, s=1, c=0) (0x300000000606015)
│ │ └───Planes:
│ │ └───Plane 0: offset = 0, pitch = 15360 bytes
│ ├───"CRTC_ID" (atomic): object CRTC = 55
│ ├───"NV_INPUT_COLORSPACE": enum {None, IEC 61966-2-2 linear FP, ITU-R BT.2100-PQ YCbCr} = None
│ ├───"NV_HDR_STATIC_METADATA": blob = 0