I just haven't been able to configurate Ubuntu 14.04 so that it starts up in the last session, just like before I shut it down
Unfortunately, hibernate doesn't work in many cases, which can cause you to lose data if you expect your documents and applications to re-open when you switch your computer back on. Therefore, hibernate is disabled by default.
Test if hibernate works
Note : Always save your work before hibernating
You should save all of your work before hibernating the computer, just in case something goes wrong and your open applications and documents cannot be recovered when you switch on the computer again.
You can use the command line to test if hibernate works on your computer.
Open the Terminal by pressing Ctrl+Alt+T or by searching for terminal in the Dash.
sudo pm-hibernateinto the terminal and press Enter.
Enter your password when prompted.
After you computer turns off, switch it back on. Did your open applications re-open?
If hibernate doesn't work, check if your swap partition is at least as large as your available RAM.
If the hibernate test works, you can continue to use the
sudo pm-hibernate command when you want to hibernate.
You can also enable the hibernate option in the menus. To do that, use your favorite text editor to create
/etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla. Add the following to the file and save:
[Re-enable hibernate by default in upower] Identity=unix-user:* Action=org.freedesktop.upower.hibernate ResultActive=yes [Re-enable hibernate by default in logind] Identity=unix-user:* Action=org.freedesktop.login1.hibernate; org.freedesktop.login1.hibernate-multiple-sessions ResultActive=yes
Source : Official Documentation
You can hibernate instead of shutting down.
Run these commands to enable it :
sudo -i touch /var/lib/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla echo "[Re-enable hibernate by default in upower] Identity=unix-user:* Action=org.freedesktop.upower.hibernate ResultActive=yes [Re-enable hibernate by default in logind] Identity=unix-user:* Action=org.freedesktop.login1.hibernate ResultActive=yes" >> /var/lib/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla
You should now have a
Hibernate option in your power menu.