[Bug 29521] Fade to black doesn't work well.

[Amodef]

Public bug report changed:
https://launchpad.net/malone/bugs/29521

Description changed to:
    When the screensaver appears, a fade should precede it. The fade is
    there but, after it, the normal screen come back, and after an half
    second, the screensaver just comes.

    I've made test with fade to black and fade to another screensaver :
    i've the same results.