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I always loved the "it's not polished" excuse withoutb a single example
Let me check dmesg:
amdgpu 0000:03:00.0: amdgpu: failed to write reg 291c wait reg 292e
or
[46531.357889] amdgpu 0000:c5:00.0: [drm] ERROR lttpr_caps phy_repeater_cnt is 0xff, forcing it to 0x80.
Let me know if more examples are needed ;)
How is support for HDR colors nowadays?
Support for HDR is fully implemented in Wayland last I checked
Looks like it’s still rough around the edges.
https://wiki.archlinux.org/title/HDR_monitor_support
KDE Plasma 6.0 introduced experimental HDR support for Wayland session.
DRM clients can directly pass HDR metadata, but this is not available from regular userspace clients, only specialized software can use it.
Web browsers: No web browsers support HDR on Linux at this time.
Valve's Steam compositor gamescope offers experimental HDR support.