Since yesterday, when after logging in, the window manager loads and I can see my icons, but the menu panel is not shown - instead you can see a sort of greyed area.
If you click on random points on the menu bar you might get some response such as the menu coming up but without colors - also clicking the icons does not work.
Clicking on the desktop icons as well has no effect.
I can switch to console and from there I quote the .xsession-errors file:
My version is Linux 3.13.0-37-generic x86_64, 17.1 Rebecca/etc/mdm/Xsession: Beginning session setup...
localuser:<username> being added to access control list
Script for none started at run_im.
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
Script for none started at run_im.
GNOME_KEYRING_CONTROL=/run/user/1000/keyring-kvTyBM
SSH_AUTH_SOCK=/run/user/1000/keyring-kvTyBM/ssh
GNOME_KEYRING_CONTROL=/run/user/1000/keyring-kvTyBM
SSH_AUTH_SOCK=/run/user/1000/keyring-kvTyBM/ssh
GPG_AGENT_INFO=/run/user/1000/keyring-kvTyBM/gpg:0:1
GNOME_KEYRING_CONTROL=/run/user/1000/keyring-kvTyBM
SSH_AUTH_SOCK=/run/user/1000/keyring-kvTyBM/ssh
GPG_AGENT_INFO=/run/user/1000/keyring-kvTyBM/gpg:0:1
GNOME_KEYRING_CONTROL=/run/user/1000/keyring-kvTyBM
SSH_AUTH_SOCK=/run/user/1000/keyring-kvTyBM/ssh
GPG_AGENT_INFO=/run/user/1000/keyring-kvTyBM/gpg:0:1
(cinnamon-settings-daemon:2474): color-plugin-WARNING **: failed to get edid: unable to get EDID for output
(cinnamon-settings-daemon:2474): color-plugin-WARNING **: unable to get EDID for xrandr-LVDS: unable to get EDID for output
libGL error: dlopen /usr/lib/i386-linux-gnu/dri/swrast_dri.so failed (/usr/lib/i386-linux-gnu/dri/swrast_dri.so: wrong ELF class: ELFCLASS32)
libGL error: failed to load driver: swrast
Cjs-Message: JS LOG: About to start Cinnamon
nm-applet-Message: using fallback from indicator to GtkStatusIcon
Window manager warning: Trying to remove non-existent custom keybinding "magnifier-zoom-in".
Window manager warning: Trying to remove non-existent custom keybinding "magnifier-zoom-out".
** (nemo:2787): WARNING **: Can not determine workarea, guessing at layout
Cjs-Message: JS LOG: Cinnamon started at Fri Apr 10 2015 11:05:21 GMT+0300 (EEST)
Cjs-Message: JS LOG: network applet: Cannot find connection for active (or connection cannot be read)
(cinnamon:2771): St-CRITICAL **: st_drawing_area_get_surface_size: assertion 'area->priv->in_repaint' failed
Cjs-Message: JS WARNING: [/home/<username>/.local/share/cinnamon/applets/hwmonitor@sylfurd/applet.js 118]: assignment to undeclared variable i
(cinnamon:2771): St-CRITICAL **: st_drawing_area_get_surface_size: assertion 'area->priv->in_repaint' failed
Cjs-Message: JS LOG: network applet: Found connection for active
Cjs-Message: JS WARNING: [/home/<username>/.local/share/cinnamon/applets/hwmonitor@sylfurd/applet.js 95]: assignment to undeclared variable index
(mintUpdate.py:2903): libglade-WARNING **: unknown attribute `swapped' for <signal>.
(mintUpdate.py:2903): libglade-WARNING **: unknown attribute `swapped' for <signal>.
(mintUpdate.py:2903): libglade-WARNING **: unknown attribute `swapped' for <signal>.
(mintUpdate.py:2903): libglade-WARNING **: unknown attribute `swapped' for <signal>.
Any ideas?