sddm.serviceorlightdm.servicefreeze with a blinking cli cursor.lspciblocks output for some time followed by some radeon lines before giving the actual output.
lspci gives the AMD GPU even though xf86-video-amdgpu is removed.
lsmod shows all the currently loaded modules, which shows radeon as well, which is the problem.
I tested it out. Removing the module using modprobe -r radeon solved the sddm issue.
modprobe -r radeon is temporary and lasts only for the current boot session.
https://chatgpt.com/share/679d9ced-970c-800c-91a8-9404df7345dd
modinfo radeon | rg filename shows the location of the driver file.
pacman -Qo <filename> says linux and not some amd/radeon package.
So you can't remove some radeon package to solve it. Need to blacklist it.
Refer to radeon-freeze.md.
https://wiki.archlinux.org/title/Kernel_module#Blacklisting
mkinitcpio -M | rg radeon to show all the detected kernel modules
mkinitcpio -v | rg radeon to for verbose output and dry run boot output