| Summary: | [Feature request] Add the ability to set an ICC profile with HDR enabled | ||
|---|---|---|---|
| Product: | [Plasma] kwin | Reporter: | fililip <team> |
| Component: | colour-management | Assignee: | KWin default assignee <kwin-bugs-null> |
| Status: | RESOLVED FIXED | ||
| Severity: | wishlist | CC: | fireculex, nate, postix, team, westlyroots, xaver.hugl |
| Priority: | NOR | ||
| Version First Reported In: | unspecified | ||
| Target Milestone: | --- | ||
| Platform: | Arch Linux | ||
| OS: | Linux | ||
| Latest Commit: | https://invent.kde.org/plasma/kwin/-/commit/7e019dfb6fd6250df9b7830ce9e704c48cc4b16f | Version Fixed/Implemented In: | 6.7.0 |
| Sentry Crash Report: | |||
| Attachments: | Synthetic HDR ICC profile with BT.2020 color primaries | ||
|
Description
fililip
2026-01-06 19:19:20 UTC
Could you attach an ICC profile for an HDR screen here? I could use one for testing. A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/8613 I don't have a colorimeter (yet), so I'm not sure how I can obtain a profile for the primary-overrepresented IPS display that I have right now, is there an alternative way to get it (i.e. by somehow extracting what KWin uses for the "built-in" profile)? No, that wouldn't be useful. I'll have to see if I can extract one from a Windows install. Created attachment 188943 [details]
Synthetic HDR ICC profile with BT.2020 color primaries
I have a monitor with a mis-calibrated HDR colorspace that causes desaturated colors for both wide color-gamut/HDR and SDR content. I do not have a colorimeter, but when I used windows I generated an ICC profile based off my monitor's EDID but with color info replaced with BT.2020 primaries. It wasn't perfect, but it made a noticeable improvement on color accuracy. I'll attach the synthetic HDR profile.
I have a monitor that uses Gamma HDR instead of PQ. I've generated a .cal file with bt 2390 and apply it using dispwin in W11. Being able to apply a 1D LUT or ICC profile is necessary for HDR to be usable on this display. Git commit 7e019dfb6fd6250df9b7830ce9e704c48cc4b16f by Xaver Hugl. Committed on 06/05/2026 at 14:29. Pushed by zamundaaa into branch 'master'. backends/drm: allow using ICC profiles with HDR There are two cases supported for this: - profiles without MHC2, which are just normal ICC profiles that were created while the display is in HDR mode - profiles with MHC2, which work like normal ICC profiles, except the primaries sent to the display are always assumed to be BT.2020, and the primares of the ICC profile are assumed to be the native primaries of the display The normal HDR calibration data the user can set (max_cll, max_fall and max reference luminance) is ignored in favor of the values in the ICC profile, to allow users to more conveniently switch between different profiles. M +40 -19 src/backends/drm/drm_output.cpp M +16 -0 src/core/backendoutput.cpp M +8 -0 src/core/backendoutput.h M +3 -0 src/core/outputconfiguration.h M +5 -1 src/opengl/icc_shader.cpp M +49 -18 src/outputconfigurationstore.cpp M +2 -0 src/outputconfigurationstore.h M +67 -12 src/wayland/outputdevice_v2.cpp M +2 -0 src/wayland/outputdevice_v2.h M +43 -12 src/wayland/outputmanagement_v2.cpp https://invent.kde.org/plasma/kwin/-/commit/7e019dfb6fd6250df9b7830ce9e704c48cc4b16f |