olpc-dm/Xorg segfault only if during systemd boot

[George Hunt]

The resolution to the segfault in olpc-dm turned out to be obvious.

XSCE developers have responded to on-the-ground requests for teamviewer,
and added it to the ansible playbook, without realizing that it is not
compatible with olpc-dm. Teamviewer daemon was being pulled in by
graphical.target.

The ansible playbook will be updated

On Mon, Sep 7, 2015 at 3:37 PM, James Cameron <quozl at laptop.org> wrote:

> The first message is a result of your problem, not a cause.
>
> The second message is normal, verified in my test just now, therefore
> not related to your problem.
>
> To look at the systemd journal for olpc-dm ...
>
>         systemctl status olpc-dm.service | cat
>
> To look at olpc-dm client logs ...
>
>         cat /tmp/olpc-dm*
>
> Do both of these in the failed state as well as the working state to
> identify the differences.
>
> On Mon, Sep 07, 2015 at 03:21:10PM -0700, George Hunt wrote:
> > I missed one obvious clue, thinking that Xorg.log was the strategic
> place to
> > look.
> >
> > /var/log/messages (search olpc-dm) shows
> >
> >   • "olpc-dm.service holdoff time over, scheduling restart"
> >   • and then "xauth: file /var/tmp/olpc-auth/.Xauthority does not exist"
> >
> > googling "Xauthority create olpc" does not give a good hit, but suggests
> I
> > should learn olpc-utils better.
> >
> > On Mon, Sep 7, 2015 at 2:44 PM, James Cameron <[1]quozl at laptop.org>
> wrote:
> >
> >     I'm interested in finding the cause; any such race condition that
> >     prevents X startup may eventually occur depending on timing, so is
> >     there some simple reproducer that we can apply to OLPC OS?
> >
> >     Where are your changes relative to OLPC OS?
> >
> >     What does the systemd journal say about olpc-dm service?
> >
> >     How do the journal, olpc-dm logs, and X logs differ between working
> >     and failing case?
> >
> >     Where does gdb show the segmentation fault occurs?
> >
> >     --
> >     James Cameron
> >     [2]http://quozl.linux.org.au/
> >
> > References:
> >
> > [1] mailto:quozl at laptop.org
> > [2] http://quozl.linux.org.au/
>
> > _______________________________________________
> > Devel mailing list
> > Devel at lists.laptop.org
> > http://lists.laptop.org/listinfo/devel
>
>
> --
> James Cameron
> http://quozl.linux.org.au/
>
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