As the title asks, how does one actually use HDR for games after upgrading to Plasma 6?
This was the feature I was most excited about, and I can hit the HDR button on my display configuration and it looks like the desktop is going into HDR mode, but so far I have had zero luck enabling the HDR feature in games. Every game I’ve tried had the HDR toggle disabled with no way to enable it.
I am running these games under Proton and I’ve tried both 8-GE and 9 Beta. Any tips?
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I haven’t tested it myself, but you’ll need to install gamescope and the Vulkan HDR layer, then set the launch options to use it.
Of course, you’ll also need a monitor that supports it, and a cable that supports it as well (I recommend using a DisplayPort 1.4+ cable).
Edit: Here’s a detailed how-to: https://zamundaaa.github.io/wayland/2023/12/18/update-on-hdr-and-colormanagement-in-plasma.html
To add to this, I was doing some testing since this is on my mind and I am also unable to get HDR working on Youtube under either Firefox or Chromium.
This may be orthogonal to running games or it could be related.
That might be more due to them not supporting HDR on Linux yet, but I’ll wait for someone else to confirm that
Hi! To enable HDR in most games you will need to set your game in fullscreen. Windowed or Borderless won’t allow you to use HDR functionality.
You’ll also need to use the
DXVK_HDR=1 %command%startup variable in steam to enable HDR in any Proton game. Proton 8 and 9 should support HDR without issuez although there are some games that might need additional configuration.If you use an NVIDIA card, you might need to enable NVAPI with
DXVK_ENABLE_NVAPI=1Happy gaming! :D
Well I was wondering this whole time how that works! Thanks a ton!
Excellent, thanks for this!
This only lets you enable hdr in game. Since proton runs under xwayland the hdr info won’t reach the compositor.
Oh really? That sucks, how do you work around that?
Gamescope supports hdr with --hdr-enabled --hdr-debug-force-output flags and running the game under it doesn’t require xwayland in my understanding. It doesn’t support nvidia though
So what is the benefit of KDE’s HDR support at that? Could you do something similar under Gnome and get HDR support in games?
If gnome supports hdr too you can. Kde’s support is a part of the stack that needs to support hdr for it to work. The programs and drivers can speak hdr all they want but if the compositor (kde) doesn’t understand and relay the info to the monitor it won’t work.
Use Gamescope and a Vulkan layer. Here’s a more detailed post: https://planet.kde.org/xavers-blog-2023-12-18-an-update-on-hdr-and-color-management-in-kwin/
If you get the latest gamescope from git. You no longer need the vulkan layer.
NVIDIA Latest Drivers:
file:
/etc/modprobe.d/nvidia.confoptions nvidia NVreg_RegistryDwords="PowerMizerEnable=0x1; PerfLevelSrc=0x2222; PowerMizerLevel=0x3; PowerMizerDefault=0x3; PowerMizerDefaultAC=0x3"These can also be set under modprobe, but I was troubleshooting a while back and it was easier to edit them this way before booting. So here’s my kernel parameters I have set:
nvidia-drm.modeset=1 nvidia-modeset.hdmi_deepcolor=1 nvidia-drm.fbdev=1 nvidia.NVreg_TemporaryFilePath=/var/tmp
To play Proton games you only need the latest gamescope from git, the HDR layer and environment variables are no longer needed for gamescope
Just set the launch arguments on Steam for any game to:
gamescope --hdr-enabled --nested-refresh 165 --fullscreen --steam -w 3440 -W 3440 -h 1440 -H 1440 -- %command%.Don’t forget to set your refresh rate and resolution.
If you want to play videos files in HDR (YouTube also works) you need to use mpv together with the HDR layer.
After installing the layer you can run mpv like this:
ENABLE_HDR_WSI=1 mpv --vo=gpu-next --target-colorspace-hint --gpu-api=vulkan --gpu-context=waylandvk "https://www.youtube.com/watch?v=dQw4w9WgXcQ".Thanks, appreciate the write up. Definitely sounds like HDR under Linux has a long way to go to reach the “just works” level.
I asked this in another thread but I would be curious to get different perspectives; could you use
gamescopeandmpvunder Gnome and get HDR support or is KDE’s HDR support essential here?Thanks, appreciate the write up. Definitely sounds like HDR under Linux has a long way to go to reach the “just works” level.
It’s not as long as you might think, by the end of the year we should have out of the box HDR on Linux. At least for Proton games. All the puzzle pieces are there, they just need to be put in place.
could you use
gamescopeandmpvunder Gnome and get HDR support or is KDE’s HDR support essential here?No, not until GNOME implements their HDR support. You can however run gamescope and mpv directly in tty instead of KDE/GNOME.
Fingers crossed on the out of the box support.
Thanks again for the knowledge.
On the Steam Deck it already “just works” for a lot of games (with an OLED or an external display). So we’re not that far off for those changes propagating to Desktop.
I finally got a chance to try this out and couldn’t get it to work then I realized you mentioned this was git only right now, and I am all Flatpak’d up, so I need to wait.
What is the specific commit that adds the magic since the last release?
Not sure, probably somewhere around when the new Wayland backend was introduced: https://github.com/ValveSoftware/gamescope/commit/9563271dea5ee4844b16a7e179e9f6bc7ed51168
I also normally run in Flatpak but I switched to native until everything settles in. Turns out the config files are compatible now so you can run either and they will pick up the others config with no issue. Just have to watch out with shader pre-compilation because if you have different Mesa versions the clients will pre-compile back and forth all the time.
