Hi, im new here. i been using ubuntu for about 1 year in my notebook Samsung SENS R530. i dont know why, but im having a problem. When im watching a movie, using facebook apps, playing games, etc. My ubuntu just log out by it self and put me in the log in screen. And all my stuff restart like crashed applications (firefox crash report). It seems like it "crashes" all the time im using applications that needs more resources.
How can i fix this? Does somebody else experiencing this?
thx for the help