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Why is there no screensaver in the default installation of Ubuntu 13.04 ? I've found that it can be installed afterwards, but I don't understand why this feature is not present by default. Has the concept of screensaver been replaced something else ? Is there a discussion somewhere where I could find an explanation for this ?

How do you install a screensaver ? Does Unity even have screensavers ?

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up vote 1 down vote accepted

There is no need for screen-savers in today's day and age. They were used to prevent CRT burn-in. Turning LCD entirely off will prevent burn-in too and save a good amount of energy.

If still want to install a screensaver then read this article.

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Do LCD screens consume the same amount of energy regardless of what is being displayed ? –  Antoine Lecaille Oct 14 '13 at 12:07
    
It doesn't matter what the content is (ie. the amount of "blackness") it will depend on the brightness it is setup though. Also, standby-mode and even turned off will be best. –  MadMike Oct 14 '13 at 12:13
    
What about LED screens? They're getting common too. Any idea about that? –  user25656 Oct 14 '13 at 12:33
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Most screens that are sold as "LED-screen" are LED-backlit LCD screens. The cold cathode fluorescent backlight is being replaced with a LED backlight and the LCD will chooses which subpixel gets how much light. Thus you don't conserve energy with more blackness on the screen. This is changing, since newer monitor will regionally dim the LED-backlight, but well. Most monitors still don't have that feature and my first comment still aplies. –  MadMike Oct 14 '13 at 12:42
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