reck7@T450s:~$ sudo systemctl disable laptop-mode.service
Synchronizing state of laptop-mode.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install disable laptop-mode
insserv: warning: current start runlevel(s) (empty) of script `laptop-mode' overrides LSB defaults (2 3 4 5).
insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script `laptop-mode' overrides LSB defaults (0 1 6).
insserv: warning: current start runlevel(s) (empty) of script `laptop-mode' overrides LSB defaults (2 3 4 5).
insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script `laptop-mode' overrides LSB defaults (0 1 6).