Which ISO version are you using?
2026-03-01
The installation log
It seems the archinstall log was not preserved after rebooting into the installed system.
Description of the issue
On a fresh archinstall setup with COSMIC + Wayland and an NVIDIA GPU, the system booted but stayed in a low-resolution/fallback-like state at first. nvidia-smi failed and only basic display modes were available.
What fixed it was completing the NVIDIA Wayland setup manually: making sure the correct NVIDIA kernel module was built/loaded, nouveau was not interfering, and nvidia_drm.modeset = 1 was present in the boot options.
After that, COSMIC worked very well. So this looks less like a COSMIC bug and more like archinstall not fully handling the NVIDIA + Wayland path in some setups.
Which ISO version are you using?
2026-03-01
The installation log
It seems the archinstall log was not preserved after rebooting into the installed system.Description of the issue
On a fresh archinstall setup with COSMIC + Wayland and an NVIDIA GPU, the system booted but stayed in a low-resolution/fallback-like state at first. nvidia-smi failed and only basic display modes were available.
What fixed it was completing the NVIDIA Wayland setup manually: making sure the correct NVIDIA kernel module was built/loaded, nouveau was not interfering, and nvidia_drm.modeset = 1 was present in the boot options.
After that, COSMIC worked very well. So this looks less like a COSMIC bug and more like archinstall not fully handling the NVIDIA + Wayland path in some setups.