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by database64128 254 days ago
> Every time I login using a Wayland desktop, only my main monitor is detected and it defaults to 60hz. I have to go through a whole process of unplugging the "undetected" monitors and plugging them back in.

Are you using GNOME? mutter has this problem where it does not retry commit on the next CRTC: https://gitlab.gnome.org/GNOME/mutter/-/issues/3833. If this is actually what's happening on your system, switching to KDE should solve it.

> HDR on Wayland is barely functional (in my experience)

This also sounds specific to GNOME, as mutter still doesn't have color management. You'll get a better HDR experience with KDE.
3 comments
zamalek 254 days ago
GNOME is typically the worst of all the options if you need feature support. They aggressively nack wayland proposals, and subsequently don't implement those proposals - while almost the entirety of the ecosystem does.
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zahlman 254 days ago
Seriously, it's bizarre to me how aggressively they pushed to use Wayland but then hold it back like that.
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tambre 254 days ago
> This also sounds specific to GNOME, as mutter still doesn't have color management.

Gnome 49 should've solved that. [0]

[0] https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4102

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database64128 254 days ago
I don't think so. I'm on GNOME 49 and nothing has changed compared to 48.
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wirybeige 254 days ago
GNOME has both color management and color representation protocols implemented. HDR works fine on it
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database64128 254 days ago
No, having the bare minimum "HDR support" does not mean it works fine. I have a 27-inch 4K 144Hz monitor with P3 wide color gamut and HDR600. This monitor is connected to 2 PCs, one running Arch Linux with GNOME as the DE and one with Windows 11.

Since Windows 11 24H2, with the new color management feature turned on, I can get correct colors on the monitor in both SDR and HDR modes. So it ends up with HDR on at all times, and mpv can play HDR videos with no color or brightness issues.

GNOME, on the other hand, is stuck with sRGB output in SDR mode, so you get oversaturated colors. With HDR on, SDR content will no longer be oversaturated, but if you play HDR videos with mpv, the image looks darkened and wrong. I've tried setting target-peak and target-contrast to match the auto-detected values on Windows, but the video still looks off.

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wirybeige 254 days ago
Sorry it doesn't work for you. I don't have that issue. Gnome looks proper in HDR mode for both HDR and SDR content for me.
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