When waking the system from S3 sleep, the local-system-resume service gives errors and does not execute.  No mention of the resume service in /var/log/messages .

[code][Unit]
Description=Local system resume actions
After=suspend.target

[Service]
Type=simple
ExecStart=echo 10 | tee /sys/class/leds/asus::kbd_backlight/brightness

[Install]
WantedBy=suspend.target[/code]

[code]# systemctl status local-system-resume
local-system-resume.service - Local system resume actions                                                                                                                                                                                                                     
   Loaded: error (Reason: Invalid argument)
   Active: inactive (dead)

Apr 11 23:15:41 hydra systemd[1]: Cannot add dependency job for unit local-system-resume.service, ignoring: Unit local-system-resume.service failed to load: Invalid argument. See system logs and 'systemctl status local-system-resume.service' for details.
Apr 12 07:37:43 hydra systemd[1]: Cannot add dependency job for unit local-system-resume.service, ignoring: Unit local-system-resume.service failed to load: Invalid argument. See system logs and 'systemctl status local-system-resume.service' for details.
Apr 12 22:59:19 hydra systemd[1]: Cannot add dependency job for unit local-system-resume.service, ignoring: Unit local-system-resume.service failed to load: Invalid argument. See system logs and 'systemctl status local-system-resume.service' for details.
Apr 13 23:31:20 hydra systemd[1]: Cannot add dependency job for unit local-system-resume.service, ignoring: Unit local-system-resume.service failed to load: Invalid argument. See system logs and 'systemctl status local-system-resume.service' for details.
Apr 14 22:46:17 hydra systemd[1]: Cannot add dependency job for unit local-system-resume.service, ignoring: Unit local-system-resume.service failed to load: Invalid argument. See system logs and 'systemctl status local-system-resume.service' for details.
Apr 15 20:52:13 hydra systemd[1]: Cannot add dependency job for unit local-system-resume.service, ignoring: Unit local-system-resume.service failed to load: Invalid argument. See system logs and 'systemctl status local-system-resume.service' for details.
Apr 15 23:04:28 hydra systemd[1]: Cannot add dependency job for unit local-system-resume.service, ignoring: Unit local-system-resume.service failed to load: Invalid argument. See system logs and 'systemctl status local-system-resume.service' for details.
Apr 16 10:43:17 hydra systemd[1]: Cannot add dependency job for unit local-system-resume.service, ignoring: Unit local-system-resume.service failed to load: Invalid argument. See system logs and 'systemctl status local-system-resume.service' for details.
Apr 16 22:48:53 hydra systemd[1]: Cannot add dependency job for unit local-system-resume.service, ignoring: Unit local-system-resume.service failed to load: Invalid argument. See system logs and 'systemctl status local-system-resume.service' for details.[/code]