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The current timer file is faulty and the systemd timer does not fire at all if the computer is restarted daily. This problem is also described here: systemd/systemd#21166 The correct way to configure the timer is `RandomizedOffsetSec=` (see [`man systemd.timer`](https://www.man7.org/linux/man-pages/man5/systemd.timer.5.html))
pierres
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Feb 5, 2026
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Thanks for the fix! I verified this issue on my own system - despite daily reboots, the timer was only firing roughly monthly instead of weekly due to RandomizedDelaySec resetting on each boot.
RandomizedOffsetSec (available since systemd 258, in Arch since September 2025) solves this by applying a stable machine-id-based offset to the calendar schedule, maintaining proper load distribution while working correctly across reboots.
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The current timer file is faulty and the systemd timer does not fire at all if the computer is restarted daily. This problem is also described here: systemd/systemd#21166
The correct way to configure the timer is
RandomizedOffsetSec=(seeman systemd.timer)