[Pkg-xfce-devel] Bug#762642: lightdm: black screen after systemd poweroff, shutdown freezes

Jakobus Schürz jakob at xundeenergie.at
Thu Oct 23 18:58:18 UTC 2014

Package: lightdm
Followup-For: Bug #762642

Dear Maintainer,

I tried a lot... even gdm and xdm. The problem is, when is start my
session (Fvwm) with lightdm, and want to shut the computer down with
systemd poweroff
the screen gets totally black. No keys working any longer. Even
I have to kill the Laptop with the Powerkey.

When i change (staying logged in in X) to a VT, the shutdown works with
systemd poweroff on the TTY. 

With gdm, shutdown from an xterm in Fvwm works with systemd, xdm also.
Only lightdm is not able to power down the Laptop. The screen always
gets totally black.

I tried KillUserProcesses=yes and no. 

I think - from some logging on the default-shell from systemd - a
user-process gets killed, before /home (it is encrypted here!!!) is
This logging also said, that lightdm.service is not tried to be stopped. 

Jakobus Schürz

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'testing-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=de_AT.UTF-8, LC_CTYPE=de_AT.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to de_AT.UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages lightdm depends on:
ii  adduser                                3.113+nmu3
ii  consolekit                             0.4.6-5
ii  dbus                                   1.8.8-2
ii  debconf [debconf-2.0]                  1.5.53
ii  libc6                                  2.19-11
ii  libgcrypt20                            1.6.2-3
ii  libglib2.0-0                           2.42.0-2
ii  libpam-systemd                         215-5+b1
ii  libpam0g                               1.1.8-3.1
ii  libxcb1                                1.10-3
ii  libxdmcp6                              1:1.1.1-1
ii  lightdm-gtk-greeter [lightdm-greeter]  1.8.5-1

Versions of packages lightdm recommends:
ii  xserver-xorg  1:7.7+7

Versions of packages lightdm suggests:
ii  accountsservice  0.6.37-3+b1
ii  upower           0.99.1-3

-- debconf information:
  lightdm/daemon_name: /usr/sbin/lightdm
* shared/default-x-display-manager: gdm3

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