I am(was) unfamiliar with Windows 8 and Ubuntu >10.04LTS. Hence it was quiet a challenge to get my new notebook Samsung NP900X3E -A01DE ready for dual boot. I exercised one week with some frustrating moments and here I summarize what was successful in the end.
1. Become familiar with some basic functions of the pre-installed Windows 8 system. Read also about UEFI to understand the new boot concept, which you will find on any Windows 8 computer.
2. Start Windows 8, have a network connection and update the firmware of your Samsung machine. Find on the Windows tile screen the "Samsung Apps - SW Update". This will download and install the latest firmware for your computer hardware, I think also for the BIOS itself. This is import, as this machine uses UEFI to support Windows 8.
3. After the firmware update you should reboot a couple of times (at least twice!) and see if everything works under Windows 8.
4. Make space for Ubuntu on the SSD disk under Windows 8. Press "Windows"-"X" buttons simultaneously and select "Diskmanagement". If the computer is brand new, you can apply shrinking largest partition in order to make space you want for Linux. You will need later at least 20GB for Linux and 1.5-times the RAM size as swap partition. I have a 512GB disk and made 256GB available for Linux including the swap space of 7GB.
If the computer is used, make first a backup of your data and defragment the disk. Do not reduce the size too much. Don't format the new disk space, we do that from Linux.
5. Still under Windows 8, download the latest ubuntu distribution, at least 13.10. (Older versions may show ugly lines on the screen.)
Find the latest iso-image on http://cdimage.ubuntu.com/daily-live/current/ (if you can't find anything newer than 13.04 on the ubuntu download page). You will need a newer Kernel than 3.10. Ubuntu 13.04 comes with kernel 3.8 and is not good enough.
Chose the 64-bit desktop version and download it. I.e. saucy-desktop-amd64.iso
6. Have a >2GB USB pendrive available (with no data). Create a bootable USB pendrive by copying the iso-image from the previous step to the USB-stick.
Use the Universal-USB-Installer: http://www.pendrivelinux.com/univers...easy-as-1-2-3/
Now you have a bootable ubuntu USB-stick.
7. Shut off Windows. Put your bootable USB-stick in.
8. Switch on your computer and press immediately F2. You will enter the BIOS.
Go to "Advanced" and disable "Fast BIOS Mode".
Go to "Boot"-"Boot Device Priority" and move your pendrive into the first position.
Check if "Secure Boot" is enabled. Ubuntu supports it. Other Linux versions might not do it (I had no luck with Linux-Mint).
F10 - save and exit.
Now the Ubuntu system should boot. Select first the Ubuntu trial (live system), which does not do any change to the hard disk.
9. Now we are working under Ubuntu. The live-system comes with gparted to format the partition for Ubuntu (>20GB) and a swap partition (1.5 times RAM). Use the space available which was obtained in the previous step 4. No boot partition is needed, as ubuntu will share the already existent EFI partition with Windows after installation.
The "/" partition should be formatted as "ext4" and "swap" should appear as "swap".
You may want to explore ubuntu for a while on your computer, check out the network function, start libre office for display checks etc., before rebooting it again.
10. After reboot from the USB-stick we select this time "install" and do not start the live-system. (I had no luck with installing Ubuntu from inside the live-system.)
If you are connected to the internet, newer software package versions will be installed (this is time consuming). But this can be done also later.
The installation process is straight forward - just be patient. Make a user account. The first user has administration privileges.
When finished you will have to restart and take off the USB-stick during the reboot cycle.
11. When the computer starts again, press immediately F10 and the BIOS offers you to either boot "Windows" or "ubuntu".
Select "ubuntu", GRUB2 will start, select Ubuntu once again and the login-screen of ubuntu should appear. Login and continue with software installations and configuration.
12. For future boots use always F10 after switching the computer on. The alternative would be to use F2 instead, but then you have to go there to "Boot"-"Boot device priority" and make the change to your priority.
I still haven't explored yet, which further configuration settings are necessary to have all the features like under Windows available (lifetime extending mode by charging the battery only 80%, regulate the dimming of the keyboard lights, fan noise regulator, etc.). I hope this description prevents you from going through one entire recovery cycle of Windows 8 (which was my case, when I got the BIOS settings wrong) and be disappointed about a brand new machine displaying missing pixels in horizontal lines across the screen (when I used ubuntu 13.04).