Session only lasts a few seconds

[JohnB]

Out of the blue I can't run Mate and XFCE sessions, though awesome still works. So I think it is a problem with X.

The error message I get is something like "session only only lasted 10 seconds, might be due to installation problem or out of disk space. Try logging in with failsafe details. Check the contents of the xsession-erros file."

Contents of file:

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/etc/mdm/Xsession: Beginning session setup...
localuser:x being added to access control list
Setting IM through im-switch for locale=en_GB.
Start IM through /etc/X11/xinit/xinput.d/all_ALL linked to /etc/X11/xinit/xinput.d/default.
Failed to connect to the VirtualBox kernel service
Failed to connect to the VirtualBox kernel service
Failed to connect to the VirtualBox kernel service
Failed to connect to the VirtualBox kernel service
Failed to connect to the VirtualBox kernel service

(x-terminal-emulator:2376): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-bar-popup-delay after class was initialised

(x-terminal-emulator:2376): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-can-change-accels after class was initialised

(x-terminal-emulator:2376): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-popup-delay after class was initialised

(x-terminal-emulator:2376): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-popdown-delay after class was initialised

(x-terminal-emulator:2376): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-label-select-on-focus after class was initialised

(x-terminal-emulator:2376): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-images after class was initialised

(x-terminal-emulator:2376): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-button-images after class was initialised

I have already tried deleting the xorg.conf file but it didn't do anything. Gparted shows lots of free space too.

[bad_brain]

hm, free disk on the HDD doesn't have to mean there is space within the file system where X runs, so just to make sure post the output of:

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df -h

also check (and post) the excerpt from /var/log/syslog when the issue appears.

[JohnB]

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df -h:

Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3       101G   32G   64G  34% /
none            4.0K     0  4.0K   0% /sys/fs/cgroup
udev            5.9G  4.0K  5.9G   1% /dev
tmpfs           1.2G  1.1M  1.2G   1% /run
none            5.0M     0  5.0M   0% /run/lock
none            5.9G     0  5.9G   0% /run/shm
none            100M  8.0K  100M   1% /run/user

Syslog:

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https://d.maxfile.ro/ajcuqrjkxs

[bad_brain]

ok, the warnings are usually no big deal, but this one here is a REAL error:

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GLib-GIO-ERROR: Settings schema 'org.mate.lockdown' is not installed#012#012aborting...

have a look here:
http://forums.mate-desktop.org/viewtopic.php?f=4&t=1736" onclick="window.open(this.href);return false;

[JohnB]

I tried updating caja but it's already the latest version.

Also did apt-get update && upgrade but the problem persists.

[JohnB]

Made a new user account which had less issues on it.