Hello, I’ve checked similar posts but they didn’t help me.
Correct me if I’m wrong, but I think that my system should be HDR ready:
- Operating System: Arch Linux
- KDE Plasma Version: 6.4.2
- Kernel Version: 6.15.5-arch1-1 (64-bit)
- Graphics Platform: Wayland
- Graphics Processor 1: AMD Radeon Graphics (RX 9060 XT OC)
- Connected via Display Port
- HDR10 Monitor (LG 43UN700P-B)
- Mesa drivers (I selected Mesa when installing Arch and didn’t mess with them after that)
I installed Windows on another drive just to check, and the HDR did work: it played HDR movies without a problem, which are my priority, I can live without HDR games.
Shouldn’t I be getting the HDR checkbox on Plasma’s Settings panel?
Any advice on how could I troubleshoot or fix this? The fact that I’m using Arch doesn’t mean I know how Linux works 
I know very little and I have no idea about what to do next, that’s why I ask for your help. Thank you.
Should I be asking the Arch people instead of KDE? I’m sorry if I made a mistake by asking here, but please point me in the right direction, I’m really lost and can’t solve this by myself.
(Also, I did try HDMI cable, it didn’t work either)
I have also a LG HDR10 monitor (LG 27LS75Q-B) and HDR works.
In my case, I have a Nvidia GTX 1070 connected via DP 1.4 to the monitor (also DP 1.4) and with propietary drivers. But it’s not fault of Mesa. A lot of people with AMD + Mesa have HDR activated.
You have here this Arch wiki (the wiki of Arch is large):
Regards
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Thank you! I’ve read about HDR on Arch’s wiki, but for some reason I didn’t see the HDR monitor part, maybe I’ll find my solution there.
This might be 499673 – Laptop internal (OLED) display is not recognized as HDR-capable - some displays only advertise HDR support in a newer way that libdisplay-info doesn’t support yet.
If you put KWIN_FORCE_ASSUME_HDR_SUPPORT=1 into /etc/environment and reboot, it will probably work.
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It worked! It was as simple as that, thank you so much.
