Bug#871618: gnome-terminal: package should depend on dbus-x11

[Mark Hedges]

dbus-user-session is installed, so I don't think that's the problem.  From
/var/log/apt/history.log, it looks like it came through when I installed
gnome-terminal, probably through some circuitous dependency if it's not
explicitly required.

I removed dbus-x11 to test.  Now I get a different error than the one I had
before:

=======================
hedges at bar:~$ dpkg --get-selections | grep dbus-user-session
dbus-user-session install

hedges at bar:~$ gnome-terminal
Error constructing proxy for org.gnome.Terminal:/org/gnome/Terminal/Factory0:
Error calling StartServiceByName for org.gnome.Terminal: Timeout was reached

hedges at bar:~$ dpkg --get-selections | grep dbus-x11

hedges at bar:~$ systemctl status --user dbus.service dbus.socket
● dbus.service - D-Bus User Message Bus
   Loaded: loaded (/usr/lib/systemd/user/dbus.service; indirect; vendor
preset: enabled)
   Active: active (running) since Thu 2017-08-10 21:10:25 UTC; 8min ago
     Docs: man:dbus-daemon(1)
 Main PID: 3786 (dbus-daemon)
   CGroup: /user.slice/user-1000.slice/user at 1000.service/dbus.service
           └─3786 /usr/bin/dbus-daemon --session --address=systemd:
--nofork --nopidfile --systemd-activation

● dbus.socket - D-Bus User Message Bus Socket
   Loaded: loaded (/usr/lib/systemd/user/dbus.socket; disabled; vendor
preset: enabled)
   Active: active (running) since Thu 2017-08-10 21:10:22 UTC; 8min ago
   Listen: /run/user/1000/bus (Stream)
  Process: 3762 ExecStartPost=/bin/systemctl --user set-environment
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus (code=exited,
status=0/SUCCESS)
   CGroup: /user.slice/user-1000.slice/user at 1000.service/dbus.socket

hedges at bar:~$ echo $DBUS_SESSION_BUS_ADDRESS
unix:path=/run/user/1000/bus

hedges at bar:~$ echo $XDG_RUNTIME_DIR
/run/user/1000

hedges at bar:~$ ls -lah /run/user/1000
total 0
drwx------ 4 hedges hedges 100 Aug 10 21:10 .
drwxr-xr-x 3 root   root    60 Aug 10 21:10 ..
srw-rw-rw- 1 hedges hedges   0 Aug 10 21:10 bus
drwx------ 2 hedges hedges 120 Aug 10 21:10 gnupg
drwxr-xr-x 3 hedges hedges 100 Aug 10 21:10 systemd

=======================

I installed dbus-x11 again, but I got the same error again.  Rebooted and
same error.

Error constructing proxy for
org.gnome.Terminal:/org/gnome/Terminal/Factory0: Error calling
StartServiceByName for org.gnome.Terminal: Timeout was reached

I verified that other X programs are working through the ssh tunnel, like
xeyes and gvim.

Thanks.
Mark

On Thu, Aug 10, 2017 at 7:14 AM, Simon McVittie <smcv at debian.org> wrote:

> On Thu, 10 Aug 2017 at 00:31:24 -0700, Mark Hedges wrote:
> > Changing the recommends to depends for dbus-user-session won't fix the
> > immediate problem, unless gnome-terminal is changed to use something
> other than
> > `dbus-launch` to do whatever it is that it's trying to do.  dbus-x11
> provides
> > the dbus-launch executable.  dbus-user-session does not.
>
> % cd gnome-terminal-3.22.2
> % ack dbus-launch
> [search produces no results]
>
> If gnome-terminal strictly requires a working D-Bus session bus, which I
> suspect it might due to being implemented with a client/server model,
> then the correct dependency is to bump the existing Recommends on
> default-dbus-session-bus | dbus-session-bus up to a Depends, as seen
> in e.g. gcr and gnome-keyring. In practice this ensures that either
> dbus-user-session or dbus-x11 is installed. I have now done this in svn.
>
> If the DBUS_SESSION_BUS_ADDRESS environment variable is not set, D-Bus
> implementations like gio (GDBus) and libdbus are expected to look for
> $XDG_RUNTIME_DIR/bus (which is set up by dbus-user-session on systemd
> systems, and could in theory be provided by a different implementation
> of the dbus-session-bus virtual package on non-systemd systems if someone
> does the work), then if that is not found, fall back to running dbus-launch
> (which is provided by dbus-x11). gnome-terminal uses gio for all its
> D-Bus needs, so it has this behaviour.
>
> See https://lists.debian.org/debian-devel/2016/08/msg00554.html for
> recommendations. dbus-launch is run by the implementation of the
> "autolaunch:" pseudo-transport that is mentioned in that mail.
>
> Regards,
>     S
>
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