Bug#781151: boot often stalls with two "A start job is running" messages: binfmt and schroot sessions

[Thibaut Paumard]

Le 25/03/2015 18:25, Thibaut Paumard a écrit :
> 
> Dear Michael,
> 
> Thanks, indeed it does look like a race condition between this script
> and systemd support for binfmt. I guess the schroot service should
> somehow depend on binfmt support to have terminated.
> 
> It is not so easy for me to check though, because the boot process tends
> to run smoothly when I reboot several times in a row. Any solution will
> take several days at least to be confirmed. I rebooted several times
> with no problem after disabling schroot, but then again with no problem
> after re-enabling it.


Dear Michael,

schroot is not the culprit. Boot stalled again today with schroot init
script disabled.

Actually, I was wrongly focusing on the last failing events.
binfmt-support is the last bit of failure remaining because it happens
to have no timeout.

Let's review the symptoms:

  - boot often stalls when I reboot after working for some time, but not
when rebooting several times in a row;

  - systemd issues messages of several services taking unusual long time
to complete;

  - boot overall feels slower than usual;

  - at least on certain occasions (perhaps always), two important
services fail to start:
    * systemd-logind
    * network-manager.

Logind fails very early, that's usually the first message after the few
kernel messages.

Now I think the impression that boot stalls is due to logind failing to
start. This is (obviously) the reason why I never see a login prompt.

Today, using the debug shell, I manually stopped binfmt support that was
failing to start, and tried starting logind manually, which did no work.
The following command never returned, I killed it with ^C after approx.
30-60s:
 systemctl start systemd-logind.service

I'm going to disable binfmt-support, just for checking, and report when
boot stalls again.

Kind regards, Thibaut.

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