The setup after you set yourself up

After installing Ubuntu Desktop, open Terminal:

GDM Monitor Layout

Copy your Gnome display settings to the login screen:

sudo cp ~/.config/monitors.xml ~gdm/.config/

Dual-boot

# Don't travel time when you switch operating systems
sudo timedatectl set-local-rtc 1

Enter sudo nano /etc/default/grub, replace GRUB_DEFAULT=0 with this, and write out (^G = Ctrl-G):

# Set default OS to last chosen
GRUB_DEFAULT=saved
GRUB_SAVEDEFAULT=true

Then enter sudo update-grub.