I recently made the switch from Windows 7 to Ubuntu 12.04 LTS on my Samsung NP-QX411 laptop.
After installing, everything was going great (not to mention the 8 second boot time with my OCZ Agility 3 SSD), However I noticed a few problems in regards to my graphics. For one, my function keys to control the brightness of my screen would not work -also my battery life wouldn’t last longer than 2 hours on a fresh charge. The function keys were not a big deal to me because the brightness could still be adjusted though the GUI. However, the battery life was a big problem. After a few days of searching around for a fix I was nearly at the point of re-installing to Windows just so I could get more use out of a battery charge.