Troubleshoot Service Errors on Start

Attempt to start the pmcd service:

systemctl start pmcd

If the service fails to start, take a look at the details:

systemctl status -l pmcd

Note the "Drop-In" file /etc/systemd/system/pmcd.service.d/dependency.conf.

View the contents of this file and note any directives referencing other services:

cat /etc/systemd/system/pmcd.service.d/dependency.conf

Attempt to start the pmlogger service:

systemctl start pmlogger

If the service won't start, perform the same exercise as above with pmcd.

Resolve the cyclical dependency by modifying the pmcd drop-in file from After=pmlogger.service to Before=pmlogger.service.

Start the pmcd service.

Enable pmcd to startup upon reboot:

systemctl enable pmcd