How to debug why a unit is started when?

[jeremy.rosen@xxxxxxxx (Jérémy Rosen)]

systemd-analyze critcal-chain gdm.service  should print the "wait 
critical chain" for your unit...i.e why it waited.

does that give you any usefull info ?

On 16/03/2018 16:49, Paul Menzel wrote:
> Dear systemd folks,
>
>
> I am trying to get the GDM login screen started earlier on a Dell XPS 
> 13 9370 with Debian Sid/unstable system with systemd 238. Currently, 
> after selecting the Linux kernel in GRUB itâ??s only displayed after 
> roughly eight to ten seconds while Linux takes around two seconds [1].
>
> Using systemd-bootchart I see that GDM is started quite late [1], and 
> I wondering if there is an option to find out why.
>
> GDMâ??s service unit [2] has the â??dependenciesâ?? below.
>
> Â Â Â  After=rc-local.service plymouth-start.service 
> systemd-user-sessions.service
>
> Is there a debug option, where systemd says, why a certain unit is 
> started? For example, reached target X and therefore starting Y.
>
>
> Kind regards,
>
> Paul
>
>
> [1] https://bugzilla.gnome.org/show_bug.cgi?id=794336
> [2] https://git.gnome.org/browse/gdm/tree/data/gdm.service.in
>
>
>
> _______________________________________________
> systemd-devel mailing list
> systemd-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/systemd-devel

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