Bug#786942: upgrade-reports: wheezy -> jessie boot lock up "A start job is running for udev wait for Complete Device Initialization"

[Michael Biebl]

Am 27.05.2015 um 23:38 schrieb Niels Thykier:
> reassign 786942 systemd,udev
> retitle 786942 systemd,udev: Long boot-time with systemd-udev-settle
> thanks
> 
> Dear systemd maintainers,
> 
> I am reassigning this upgrade report to you, in the hopes that you can
> solve it (or point us in the right direction).  Please be sure to notify
> me explicitly if you reassign it back to "upgrade-reports".
> 
> Quick summary:
> 
>  * Karl (CC'ed) reported really long boot times (+10 minutes) after
>    upgrade. He had already found a work around by masking the service
>    systemd-udev-settle.service
>  * I advised Karl to purge acpid based on the recommendation in the
>    release-notes plus [archbug#43023], which suggested that acpid with
>    systemd-udev-settle.service caused this (and other) issue(s).
>  * Karl unmasked the service and purged acpid.  The boot time is now
>    reasonable, but we still see two services with a questionable long
>    boot time:
>    - systemd-udev-settle.service: 18+ seconds

systemd-udev-settle is known to be slow, depending on the
hardware/software configuration, it can take quite a bit of time until
all uevents are processed.
In case of Karl, it's being pulled in by nut.

>    - nut-driver.service: 11+ seconds

What kind of hardware is this: CPU/RAM/HDD/SSD?
Having a service take 11 seconds is not that unusual if other/multiple
I/O intensive tasks are running during boot.


I'm unsure what this bug report is supposed to be about.
Is this about systemd-udev-settle being slow (not a bug imho) or acpid
interacting badly with systemd-udev-settle.service, thus breaking the boot?

Karl, can you re-enable both acpid and systemd-udev-settle, as it was
after the upgrade, then boot with the following added to the kernel
command line:

systemd.debug-shell

This will give you debug shell on tty9. Please switch there and provide
the output of systemctl list-jobs, ps aux and journalctl -alb





-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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