[Pkg-utopia-maintainers] Bug#612680: dbus-x11: X11 started from text console, dbus-launch terminates dbus-daemon if text console is used

[Tilmann Böß]

Package: dbus-x11
Version: 1.2.24-4
Severity: normal
Tags: squeeze

I start X11 from a text console using a small wrapper "startx-wrapper"
(without the traps, X11 freezes when switching to the console and
back to X11):

  #!/bin/bash
  trap '' HUP INT TSTP TTIN TTOU QUIT
  shopt -u huponexit
  startx $@

Start X11:

 ./startx-wrapper -- :1 > X.log 2>&1 &

Running dbus processes ( ps -fu root | egrep '[P]ID|[d]bus-' ):

UID        PID  PPID  C STIME TTY          TIME CMD
root     11236 11225  0 22:14 tty2     00:00:00 /usr/bin/ck-launch-session /usr/bin/dbus-launch --exit-with-session /usr/bin/fvwm2
root     11285     1  0 22:14 tty2     00:00:00 /usr/bin/dbus-launch --exit-with-session /usr/bin/fvwm2
root     11286     1  0 22:14 ?        00:00:00 /usr/bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session

Now I switch to to the text console, do just anything (a single CR suffices)
and the dbus-daemon is terminated by the babysitter process dbus-launch:

UID        PID  PPID  C STIME TTY          TIME CMD
root     11236 11225  0 22:14 tty2     00:00:00 /usr/bin/ck-launch-session /usr/bin/dbus-launch --exit-with-session /usr/bin/fvwm2

Simultaneous output of "dbus-monitor":
signal sender=org.freedesktop.DBus -> dest=:1.0 serial=2 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameAcquired
 string ":1.0"
method call sender=:1.0 -> dest=org.freedesktop.DBus serial=3 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=AddMatch
 string "type='method_call'"
method call sender=:1.0 -> dest=org.freedesktop.DBus serial=4 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=AddMatch
 string "type='method_return'"
method call sender=:1.0 -> dest=org.freedesktop.DBus serial=5 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=AddMatch
 string "type='error'"
signal sender=(null sender) -> dest=(null destination) serial=0 path=/org/freedesktop/DBus/Local; interface=org.freedesktop.DBus.Local; member=Disconnected

IMHO, dbus-launch should not terminate dbus-daemon in this case.  It should 
ignore input from the TTY.

As a workaround, I modified /etc/X11/Xsession.d/75dbus_dbus-launch and deleted
the option --exit-with-session of dbus-launch, but this has the undesired
side effect that dbus-daemon runs on forever even if the X11 session is 
terminated.

For the superuser, I can use the command detachtty around startx, but this 
does not work for an unprivileged user.

I did not notice such a problem before in Lenny.

Regards,
 Tilmann

-- System Information:
Debian Release: 6.0
 APT prefers squeeze-updates
 APT policy: (500, 'squeeze-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_DK.UTF-8, LC_CTYPE=en_DK.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages dbus-x11 depends on:
ii  dbus                          1.2.24-4   simple interprocess messaging syst
ii  libc6                         2.11.2-10  Embedded GNU C Library: Shared lib
ii  libx11-6                      2:1.3.3-4  X11 client-side library

dbus-x11 recommends no packages.

dbus-x11 suggests no packages.

-- no debconf information

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