Make sure that all required packages to run wayland are installed, then you can log in the wayland session, but it will not work as you might want and there are plenty of issues.
That should be in /etc/grub
that should be in /etc/mkinitcpio.conf
You have to run sudo mkinitcpio -P
and then sudo update-grub
I did that all, except my grub file is in /etc/default directory. I’m pretty sure these options have been applied as the startup changed slightly. I installed Sway yesterday and it also stucks.
Followed SDDM archwiki. SDDM launches, but not sure it launches on Wayland. Also played with kwin_wayland command, it prints some errors:
kf.globalaccel.kglobalacceld: Failed to register service org.kde.kglobalaccel
kwin_core: Failed to update gamma ramp for output KWin::X11WindowedOutput(0x564f3e11b550, name="X11-0", geometry=QRect(0,0 1024x768), scale=1)