Comment 66 for bug 1480349

@Srinivas,

systemd uses targets which serve a similar purpose as runlevels, to change this on a running system one uses sysemctl

1. To list different target types use:

systemctl list-units --type=target

multi-user.target is equivalent to run level 3
graphical.target is equivalent to run level 5

2. Edit the thermald service config:

/lib/systemd/system/thermald.service

and set WantedBy=graphical.target

run:

sudo systemctl enable thermald.service

and this will setup the symlinks to enable this service on the graphical.target target level