Autologin and start X11
I have full disk encryption enabled and so don't want to have to type my disk encryption password and then log in as my user immediately afterwards.
For Arch Linux it's in the AUR
systemctl enable xlogin@username
I found that this would not work, X wouldn't actually start. Examining the logs
/var/log/Xorg.0.log.old if you manually start X
before digging around) I could see that X11 couldn't find any display outputs.
So I added a kludge: in
/etc/systemd/system/x@.service.d/wait.conf (which you
will need to create):
[Service] ExecStartPre=/bin/sleep 3
There's probably a better way to do this - maybe the x service needs some dependency it doesn't have? But this has worked fine for me for a long time.