I have Ubuntu 11.04 (natty).
I have read 'Screen goes blank when VLC is playing video' My question is similar, but also I have this problem when viewing a video on youtube.
I am not quite clear about the meaning of 'computer idle'. Is it considered idle only when the keyboard or mouse is not being used? Because, when watching a video stored on HDD using VLC, or when watching a youtube video in a browser, there is some disk activity. And I was thinking that this means that the computer is not idle.
system settings -> control center -> screensaver preferences, I have a check mark for 'Activate screensaver when computer is idle' set to 5 min. And the screen goes blank while watching videos in VLC or in a browser.
The answer suggested in the question refered to above (Screen goes blank when VLC is playing a video) suggests to disable the screensaver. I was hoping not to have to turn off the screensaver each time I want to watch a video.
I wanted to understand the meaning of 'computer idle' so I have asked this as a separate question rather than asking this in the above referred question. If this is not appropriate, please feel to mark this as a duplicate.