Bug#755761: gdm3: Unable to start KDE after last gdm3 upgrade

Wed Jul 23 02:32:10 UTC 2014

Package: gdm3
Version: 3.12.2-2
Severity: critical
Justification: breaks unrelated software

After today's gdm3 upgrade on testing from 3.8 to 3.12, I'm unable to
sucessfully logon onto my KDE4 setup.

Here is what is happening here: after the gdm3 upgrade, if I try to start a KDE
session by logging in, KDE hangs at the startup screen. Only the "harddrive"
icon is shown. System remains responsive (can switch to VTs, can SSH in, mouse
pointer still moves...). If I launch a task manager (like htop), there are
about 3 "kdeinit4" process in a tree:
/usr/bin/kdeinit4 --oom-pipe 4 +kcminit_startup
CPU load during this hang remains at zero. There is no disk activity present.
For all effects the system sat there, idle.

After poking a bit those "hung" kdeinit4 processes with GDB, if I kill the one
with the following backtrace:
#0  0x00007f38346195c0 in __read_nocancel () at ../sysdeps/unix/syscall-
template.S:81
#1  0x00000000004070d5 in _start ()
....KDE resumes startup as usual (it's almost always the second-to-last kdeinit4
process in the tree). Another workaround is to switch to a different login
manager (be it kdm or LightDM), and in such case KDE starts up without
incident, but these aren't really good options to me as I like using GDM.

Yesterday's systemd-sysv update doesn't seem to be relevant to this case, as
the older version of gdm3 worked fine until today, when I received the faulty
upgrade.

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'testing-updates'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=es_VE.UTF-8, LC_CTYPE=es_VE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gdm3 depends on:
ii  accountsservice                              0.6.37-2
ii  adduser                                      3.113+nmu3
ii  dconf-cli                                    0.20.0-2
ii  dconf-gsettings-backend                      0.20.0-2
ii  debconf [debconf-2.0]                        1.5.53
ii  gir1.2-gdm3                                  3.12.2-2
ii  gnome-session [x-session-manager]            3.12.1-3
ii  gnome-session-bin                            3.12.1-3
ii  gnome-session-flashback [x-session-manager]  3.8.0-3
ii  gnome-settings-daemon                        3.12.2-1
ii  gnome-shell                                  3.12.2-3
ii  gnome-terminal [x-terminal-emulator]         3.12.3-1
ii  gsettings-desktop-schemas                    3.12.2-1
ii  kde-window-manager [x-window-manager]        4:4.11.9-1
ii  konsole [x-terminal-emulator]                4:4.13.1-1
ii  libaccountsservice0                          0.6.37-2
ii  libatk1.0-0                                  2.12.0-1
ii  libaudit1                                    1:2.3.7-1
ii  libc6                                        2.19-7
ii  libcairo-gobject2                            1.12.16-2
ii  libcairo2                                    1.12.16-2
ii  libcanberra-gtk3-0                           0.30-2
ii  libcanberra0                                 0.30-2
ii  libgdk-pixbuf2.0-0                           2.30.7-1
ii  libgdm1                                      3.12.2-2
ii  libglib2.0-0                                 2.40.0-3
ii  libglib2.0-bin                               2.40.0-3
ii  libgtk-3-0                                   3.12.2-1+b1
ii  libpam-modules                               1.1.8-3
ii  libpam-runtime                               1.1.8-3
ii  libpam-systemd                               208-6
ii  libpam0g                                     1.1.8-3
ii  libpango-1.0-0                               1.36.3-1
ii  libpangocairo-1.0-0                          1.36.3-1
ii  librsvg2-common                              2.40.2-1
ii  libselinux1                                  2.3-1
ii  libsystemd-daemon0                           208-6
ii  libsystemd-id128-0                           208-6
ii  libsystemd-journal0                          208-6
ii  libsystemd-login0                            208-6
ii  libwrap0                                     7.6.q-25
ii  libx11-6                                     2:1.6.2-2
ii  libxau6                                      1:1.0.8-1
ii  libxdmcp6                                    1:1.1.1-1
ii  libxrandr2                                   2:1.4.2-1
ii  lsb-base                                     4.1+Debian13
ii  marco [x-window-manager]                     1.8.1+dfsg1-1
ii  mate-session-manager [x-session-manager]     1.8.1-4
ii  mate-terminal [x-terminal-emulator]          1.8.0+dfsg1-3
ii  metacity [x-window-manager]                  1:2.34.13-1
ii  policykit-1                                  0.105-6
ii  ucf                                          3.0030
ii  x11-common                                   1:7.7+7
ii  x11-xserver-utils                            7.7+3
ii  xterm [x-terminal-emulator]                  308-1

Versions of packages gdm3 recommends:
ii  at-spi2-core               2.10.2-3
ii  desktop-base               7.0.3
ii  gnome-icon-theme           3.12.0-1
ii  gnome-icon-theme-symbolic  3.12.0-1
ii  x11-xkb-utils              7.7+1
ii  xserver-xephyr             2:1.15.99.904-1
ii  xserver-xorg               1:7.7+7
ii  zenity                     3.12.1-1

Versions of packages gdm3 suggests:
ii  gnome-orca            3.12.1-1
ii  libpam-gnome-keyring  3.8.2-2+b1

-- Configuration Files:
/etc/gdm3/greeter.gsettings [Errno 2] No existe el fichero o el directorio: u'/etc/gdm3/greeter.gsettings'

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