I chose the non-free option on the boot menu, it then restarted and started loading modules and starting services… network manager, systemd-logind and snapd reported failures.
I’ve logged into tty, and used systemctl to check systemd-logind - seems to be running.
Then I proceeded to try startx - fails.
lspci revealed that I was using the nouveau driver, which is probably the reason. From the wiki I saw that I need to use mhwd to install the nonfree nvidia driver - buy it requires restart… which won’t help before manjaro is installed to my ssd… How do I get it to install? preferably through the graphics interface…