Renaming /etc/xdg/autostart/at-spi-dbus-bus.desktop to /etc/xdg/autostart/at-spi-dbus-bus.disabled worked for me.
Renaming /etc/xdg/ autostart/ at-spi- dbus-bus. desktop to /etc/xdg/ autostart/ at-spi- dbus-bus. disabled worked for me.