And voila, finally Solus Plasma installed.
After having passed the login, for info login = live and then for the password key "enter".
Then stop and start sddm
systemctl stop sddm.service
systemctl start sddm.service
Installation of Solus Plasma.
falling on a black screen but having access to the TTY, updating the environment
sudo eopkg up
reboot and here is Solus Plasma
Really happy to have it installed.
