Systemd – Timer Expired While Suspended

suspendsystemdsystemd-timer

I have created a systemd user timer that expires daily, i.e. at midnight. The problem is that my computer is normally suspended at night. When I wake it up in the morning, I want the timer to trigger, but that doesn't happen. I discovered the Persistent option, but that only helps when the system is powered down, since it triggers expired timers when starting the services. Is there a solution to this other than e.g. running an hourly timer and saving a timestamp to a file somewhere?

Edit 2017-03-17:
I'm using systemd 231 on ubuntu 16.10.
What I want to is to run remind once a day, preferably when I wake up the computer in the morning.

Best Answer

It seems there is no problem with the Persistent option and suspend. The problem seems to be that Persistent=true only works if the timer has had a chance to trigger at least once, i.e. if LAST is not n/a. But my computer is normally suspended at midnight, so the timer has never triggered.

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Systemd – Run User’s Timer Without Open Session

A quick search for [systemd users] found this answer as the first result for you:

The systemd user instance is started after the first login of a user and killed after the last session of the user is closed. Sometimes it may be useful to start it right after boot, and keep the systemd user instance running after the last session closes, for instance to have some user process running without any open session. Lingering is used to that effect. Use the following command to enable lingering for specific user:
# loginctl enable-linger username

Enable this as a group level does not appear to be supported. Instead, enable it for every member of the group.

Temporarily stop all systemd timer units

To stop all currently running timers, you can simply use:

systemctl stop '*.timer'

To restart the timers later, you’ll have to remember which ones were running at the time.

timers=$(systemctl list-units --type=timer --state=active --no-legend | awk '{print $1}')
systemctl stop $timers
# ...
systemctl start $timers

(Apparently patterns for units don’t match inactive units, so systemctl start '*.timer' doesn’t work.)

Best Answer

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Systemd – Run User’s Timer Without Open Session

Temporarily stop all systemd timer units

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