[Pkg-systemd-maintainers] Bug#726466: Bug#726466: libsystemd-login0: while logging in to tty6 got Failed to issue method call.

[Ernest Adrogué]

2013-12-21, 11:43 (+0100); Michael Stapelberg escriu:
> Hi Ernest,
> 
> Ernest Adrogué <nfdisco at gmail.com> writes:
> > I can confirm this.  The message appears on tty6 after a successful login on
> > a tty or lightdm.  This is on a recently installed (3 weeks ago) Debian
> > "testing" system.  I think this may have been going on since the first day,
> > although I haven't noticed until now. 
> Are you 100% sure that it appears _after a successful login_? Because I
> have been experimenting some more and it turns out that when you use the
> NAutoVTs (and possibly ReserveVT) settings in /etc/systemd/logind.conf
> (they are not enabled by default in systemd 204-5) and then switch to a
> VT which does not have a getty running (e.g. vt8), I get that message.

Okay... it was an illusion.  It's not the login.  So far the message only
appears

1) when I switch to tty6, and

2) when I login on tty6.

Everything in /etc/systemd/logind.conf is commented out.

> This is because logind tries to activate autovt at tty8.service unit
> unconditionally, i.e. without checking whether systemd is pid1 or
> not. It should be a simple fix (and the error message is uncritical),
> but it does sound a bit different from what you people have been
> reporting, since you never complained about no getty showing up on a VT.
> 
> In strace it looks like this:
> 
> 9020  epoll_wait(4, {{EPOLLERR, {u32=3, u64=3}}}, 1, 4294967295) = 1
> 9020  lseek(5, 0, SEEK_SET)             = 0
> 9020  read(5, "tty8\n", 63)             = 5
> 9020  timerfd_create(CLOCK_MONOTONIC, 0x80800 /* TFD_??? */) = 14
> 9020  timerfd_settime(14, 0, {it_interval={25, 0}, it_value={25, 0}},
> NULL) = 0
> 9020  epoll_ctl(10, EPOLL_CTL_ADD, 14, {EPOLLIN, {u32=14206400,
> u64=14206400}}) = 0
> 9020  sendmsg(9, {msg_name(0)=NULL,
> msg_iov(2)=[{"l\1\0\1!\0\0\0\25\0\0\0\240\0\0\0\1\1o\0\31\0\0\0/org/freedesktop/systemd1\0\0\0\0\0\0\0\6\1s\0\30\0\0\0org.freedesktop.systemd1\0\0\0\0\0\0\0\0\2\1s\0
> \0\0\0org.freedesktop.systemd1.Manager\0\0\0\0\0\0\0\0\3\1s\0\t\0\0\0StartUnit\0\0\0\0\0\0\0\10\1g\0\2ss\0",
> 176}, {"\23\0\0\0autovt at tty8.service\0\4\0\0\0fail\0", 33}],
> msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 209
> 9020  poll([{fd=9, events=POLLIN}], 1, 25000) = 1 ([{fd=9,
> revents=POLLIN}])
> 9020  recvmsg(9, {msg_name(0)=NULL,
> msg_iov(1)=[{"l\3\1\0014\0\0\0\10\0\0\0u\0\0\0\6\1s\0\5\0\0\0:1.32\0\0\0\4\1s\0,\0\0\0org.freedesktop.DBus.Error.Spawn.ChildExited…
> 
> Could you please run the following command?
> 
> sudo strace -f -s 2048 -o /tmp/strace.log -p $(pidof systemd-logind)
> 
> Then reproduce the issue, cancel the strace, attach /tmp/strace.log to
> this bug.

I made four traces: switching to tty6 and to tty5, logging in on tty6 and on
tty5, so you can see the difference.  From what I see it's the same error as
in your strace output.

Regards.

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