I can't see any reason why LightDM could be affecting this - it only
sets up the environment and then runs the session. Is this running under
Mir? Because /usr/share/lightdm/lightdm.conf.d/52-ubuntu-touch.conf has:
[SeatDefaults]
type=unity
user-session=ubuntu-touch
session-wrapper=/usr/sbin/ubuntu-touch-lightdm-session
unity-compositor-command=/usr/share/ubuntu-touch-session/usc-wrapper
[LightDM]
minimum-vt=1
Which makes /usr/sbin/ubuntu-touch-lightdm-session:
if [ -n "$MIR_SOCKET" ]; then
exec $@
else
exec lightdm-session $@
fi
Which suggests under Mir none of the X session code would be run at all?
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dbus in Ubuntu.
https://bugs.launchpad.net/bugs/1654365
Title:
Session dbus lauched by /etc/X11/Xsession.d/75dbus_dbus-launch dies
immediately
Status in dbus package in Ubuntu:
New
Status in ubuntu-touch-session package in Ubuntu:
New
Bug description:
We've been troubleshooting an issue with dbus on:
$ system-image-cli -i
current build number: 115
device name: frieza_arm64
channel: ubuntu-touch/staging/ubuntu
last update: 2017-01-05 18:30:16
version version: 115
version ubuntu: 20170105.1
version device: 20161014.0
version custom: 20170105.1
I've come to the conclusion as follows:
The session dbus daemon is launched by lightdm through Xsession.d
/75dbus_dbus-launch (pstree):
systemd,1 fixrtc
`-lightdm,2384
`-lightdm,2439 --session-child 11 16
`-dbus-launch,2692 --exit-with-session ubuntu-touch-session
`-dbus-launch,2747 --exit-with-session ubuntu-touch-session
`-dbus-daemon,2748 /usr/bin/dbus-daemon --fork --print-pid
4 --print-address 6 --session
Due to how the touch session is set up, dbus-launch subsequently kills
the daemon because of the --exit-with-session option. Not sure exactly
how/why this happens yet.
The dbus-launch PID is replaced with upstart:
phablet 2692 13.6 0.1 45948 3688 ? Ss 19:25 0:21
upstart --user
It was fine so far because the session upstart dbus job launched a
session dbus regardless. With the change in
https://launchpad.net/ubuntu/+source/dbus/1.10.6-1ubuntu3.2 however,
it won't launch one if DBUS_SESSION_BUS_ADDRESS is set already. The
environment is left with the address of the dead session dbus and so
we're left with a bogus environment variable...
=== Workaround ===
It's possible to disable the Xsessions-dbus script by editing
/etc/X11/Xsession.options and commenting out the following entry:
use-session-dbus
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-touch-session 0.108+16.04.20161206-0ubuntu1
Uname: Linux 3.10.93+ aarch64
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: arm64
Date: Thu Jan 5 19:06:28 2017
PackageArchitecture: all
SourcePackage: ubuntu-touch-session
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.ubuntu-touch-session.d.android.conf:
GRID_UNIT_PX=13
QTWEBKIT_DPR=1.0
NATIVE_ORIENTATION=landscape
FORM_FACTOR=tablet
mtime.conffile..etc.ubuntu-touch-session.d.android.conf: 2016-10-14T08:44:51
upstart.bluez-mpris-proxy.log:
Can't get on session busCan't get on session busCan't get on session
busCan't get on session busCan't get on session busCan't get on session
busCan't get on session busCan't get on session busCan't get on session
busCan't get on session busCan't get on session busCan't get on session
busCan't get on session busCan't get on session busCan't get on session
busCan't get on session busCan't get on session busCan't get on session
busCan't get on session busCan't get on session busCan't get on session
busCan't get on session busorg.bluez appeared
Bluetooth Adapter /org/bluez/hci0 found
player core.ubuntu.media.Service at :1.1746 found
upstart.obexd.log:
Failed to connect to socket /tmp/dbus-lf2wBKftE7: Connection refused
Failed to connect to socket /tmp/dbus-ej3pH8DVYy: Connection refused
upstart.plymouth-log.override: manual
upstart.plymouth-shutdown.override: manual
upstart.plymouth.override: manual
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