Gentoo overlay with next generation COSMIC DE. This DE is in beta, but already usable for daily driving.

eselect repository add cosmic-overlay git https://github.com/aladmit/cosmic-overlay.git
emaint sync -r cosmic-overlay

Ebuilds follow releases from cosmic-epoch

emerge -av cosmic-base/cosmic

After installation COSMIC should be available to choose in you login manager(Wayland only).

COSMIC has it's own login manager cosmic-greeter working on top of greetd. Disable all other login managers like GDM and enable cosmic-greeter.

systemctl enable cosmic-greeter-daemon
systemctl enable cosmic-greeter

Issue: xdg-desktop-portal-cosmic#102

XDG portal doesn't support org.freedesktop.portal.OpenURI interface. Install gtk and nautilus as a fallback.

sudo emerge -av sys-apps/xdg-desktop-portal-gtk gnome-base/nautilus

Issue: cosmic-files#61

It happens when cosmic renders using opengl/gles. Force vulkan render by setting systemd-wide environment variable.

/etc/env.d/99local

WGPU_BACKEND=vulkan

Then run sudo env-update and restart cosmic.