I know that HDR has been working in GNOME since v46 but now that they're introducing a user facing toggle I've decide to actually do the research and figure out if it actually works. Here's what you need to do:
1. Get the GNOME 48 Beta
You'll have to figure that out on your own but on Arch it's as simple as adding
[gnome-unstable] Include = /etc/pacman.d/mirrorlist at the top of your sources in /etc/pacman.conf.
2. Reboot and start your Wayland session
Refer to Wayland / GDM if you need help. NVIDIA users will need to do additional steps.
3. Enable the HDR toggle
Settings -> Display.
For Gaming I'm not a 100% sure that it actually works but you can try it out yourself
- Steam
gamescope --hdr-enabled --hdr-debug-force-output -- DXVK_HDR=1 %command% - Heroic Games Launcher
Advanced
-> Environment Variables: DXVK_HDR=1
Gamescope
-> Enable Upscaling [This is needed to use Gamescope at all]
-> Additional options: --hdr-enabled --hdr-debug-force-output
Without --hdr-debug-force-output the game will look washed out which is why I can't say for sure if this is some sort of HDR emulation or the real deal. It behaves very similarly to Windows so I'm leaning on real deal. Anyway Gamescope does say
[Gamescope WSI] Surface state: server hdr output enabled: true hdr formats exposed to client: true But what I know for sure works is Media:
4. Install VK_hdr_layer
If you're on Arch you can simply install vk-hdr-layer-kwin6-git from the AUR.
5. Open GNOME's Looking Glass and enable Debug Control
ALT + F2 and then enter lg, go to Flags -> debug-control
6. Download debug-control.py and run
python debug-control.py --enable ColorManagementProtocol 7. Start mpv with your media
ENABLE_HDR_WSI=1 mpv --vo=gpu-next --target-colorspace-hint --gpu-api=vulkan --gpu-context=waylandvk hdr.mp4 If you did everything correctly you shoud see a HDR10 property after pressing i. You'll have to repeat steps 4-7 everytime you reboot so let's hope that the color management protocol will get merged for GNOME 48.
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