SDR colors look washed out when HDR is enabled even at 100% SDR color intensity. The cause is this merge request: https://invent.kde.org/plasma/kwin/-/merge_requests/5069. Reverting it allows SDR colors to look identical to HDR disabled. SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 6.0.1 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.2 Kernel Version: 6.6.15 (64-bit) Graphics Platform: Wayland
This is a driver bug. Colors should look identical at 0% SDR color intensity. What GPU do you have? For amdgpu this was fixed in kernel 6.7
Just updated to KDE 6 today and I think I have the same problem. With HDR enabled and SDR brightness set to 400% there's less contrast in colours and everything appears to be more washed out. Changing the SDR Color Intensity has no effect on the image. I am running mesa drivers. Operating System: Arch Linux KDE Plasma Version: 6.0.1 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.2 Kernel Version: 6.7.8-arch1-1 (64-bit) Graphics Platform: Wayland Processors: 24 × AMD Ryzen 9 3900X 12-Core Processor Graphics Processor: AMD Radeon RX 7900 XT
My specs: CPU: AMD Ryzen 7 5800h GPU: Radeon Vega 8 (Cezanne) Display(s): Built-in Laptop OLED Display (Samsung ATNA40YK04-0) Type of Display Connection: eDP Kernel 6.7 doesn't make a difference, but I'm having to revert the patch I think you might be referencing, due to this issue: https://gitlab.freedesktop.org/drm/amd/-/issues/3151
(In reply to Amine Hassane from comment #3) > Kernel 6.7 doesn't make a difference, but I'm having to revert the patch I > think you might be referencing, due to this issue: > https://gitlab.freedesktop.org/drm/amd/-/issues/3151 Yeah that'll cause this. AMD is working on a fix that doesn't cause such regressions; once that's done this issue should be gone for you. (In reply to deadmeu from comment #2) > Just updated to KDE 6 today and I think I have the same problem. With HDR > enabled and SDR brightness set to 400% there's less contrast in colours and > everything appears to be more washed out. Changing the SDR Color Intensity > has no effect on the image. > > I am running mesa drivers. > > Operating System: Arch Linux > KDE Plasma Version: 6.0.1 > KDE Frameworks Version: 6.0.0 > Qt Version: 6.6.2 > Kernel Version: 6.7.8-arch1-1 (64-bit) > Graphics Platform: Wayland > Processors: 24 × AMD Ryzen 9 3900X 12-Core Processor > Graphics Processor: AMD Radeon RX 7900 XT Could you please file a new bug report about that? While the symptoms sound the same, the cause will be different (unless you also patched your kernel?)