# NTP versus Systemd-timesyncd on the VOXL2

Source: https://forum.modalai.com/topic/4787/ntp-versus-systemd-timesyncd-on-the-voxl2
Category: VOXL 2 and VOXL 2 Mini (https://forum.modalai.com/category/26/voxl-2-and-voxl-2-mini)
Tags: voxl-2
Posted: 2025-10-01 18:10:44 UTC by Aaron Porter
Replies: 3 · Views: 785

## Aaron Porter · 2025-10-01 18:10:44 UTC

Hello,

  Just a general question about timesyncd and how it is used in voxl-services. I installed NTP onto the VOXL2 without an issue and noticed that systemd-timesyncd can not run at the same time. So since systemd-timesyncd is just a simplified version of NTP that only perform as a client so there shouldn't be any issue. I have to double check with voxl-mavlink-server and the updating time stamps when not connected to the internet. That is really the only thing that I would foresee causing an issue. Not sure if anyone else would have an idea of anything else I should check?

Thank you for your time,
Aaron Porter

## Reply by Alex Kushleyev (ModalAI staff) · 2025-10-06 17:21:30 UTC

@Aaron-Porter , I believe the time sync services are interchangeable, such as `systemd-timesyncd`, `ntpd`, `chronyd`. I don't think we have tried using anything other than the default `systemd-timesyncd` on voxl2.

If you try those out, please let us know if you find any issues! Thanks

Alex

## Reply by Aaron Porter · 2025-10-08 15:42:15 UTC (in reply to Alex Kushleyev)

@Alex-Kushleyev we are seeing this issue with NTP were the time is saying that the Service has been running for 2 years 7 months when the VOXL2 is booted up. It doesn't seem to correct after that. I am looking into away to solve this issue but odd that TimeSyncd didn't have the same issue.

## Reply by Alex Kushleyev (ModalAI staff) · 2025-10-08 21:57:57 UTC (in reply to Aaron Porter)

@Aaron-Porter , perhaps `systemd-timesyncd` works together with `systemd` to correctly interpret the clock adjustments, so that run-time of `systemd` services is properly calculated.

Alex