Bug#789764: gnome-session: gnome screen freeze - libnm-glib-WARNING error updating connection ipv4.routes invalid

[WhilelM]

Package: gnome-session
Version: 3.14.0-2
Severity: normal


Got gnome screen freezes (with mouse still displaying and moving). Some
time it's recoverable, but mostly I was reduced to shift to TTY to
reboot or restart gnome.

It's related to network problem as it can occur at the moment I unplug
network wire cable.

Found those repeted messages in syslog:
Jun 24 10:24:48 littlegr82 gnome-session[1585]:
(gnome-settings-daemon:1718): libnm-glib-WARNING **: replace_settings:
error updating connection /org/freedesktop/NetworkManager/Settings/26
settings: (1) ipv4.routes: 1. route is invalid
Jun 24 10:24:48 littlegr82
org.freedesktop.Telepathy.AccountManager[1649]: (process:1784):
libnm-glib-WARNING **: replace_settings: error updating connection
/org/freedesktop/NetworkManager/Settings/26 settings: (1) ipv4.routes:
1. route is invalid
Jun 24 10:24:48 littlegr82 gnome-session[1585]: (nm-applet:2005):
libnm-glib-WARNING **: replace_settings: error updating connection
/org/freedesktop/NetworkManager/Settings/26 settings: (1) ipv4.routes:
1. route is invalid
Jun 24 10:24:49 littlegr82 gnome-session[1585]: (gnome-shell:16673):
libnm-glib-WARNING **: replace_settings: error updating connection
/org/freedesktop/NetworkManager/Settings/26 settings: (1) ipv4.routes:
1. route is invalid

Thanks for your help to diagnose it.

-- System Information:
Debian Release: 8.1
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=fr_FR.utf8, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gnome-session depends on:
ii  gnome-session-bin      3.14.0-2
ii  gnome-session-common   3.14.0-2
ii  gnome-settings-daemon  3.14.2-3
ii  gnome-shell            3.14.4-1~deb8u1

gnome-session recommends no packages.

Versions of packages gnome-session suggests:
ii  desktop-base      8.0.2
ii  gnome-keyring     3.14.0-1+b1
ii  gnome-user-guide  3.14.1-1

-- no debconf information