Comment # 12 on bug 1101393 from Maurizio Galli

(In reply to Stefan Seyfried from comment #9)
> I reproduced the issue.
> 
> The problem is, that xscreensaver (our default in XFCE) by default has the
> feature "fade to black on activation" with a fade time of 3 seconds.
> 
> So what is happening is:
> 
> * suspend is triggered
> * xfce4-power-manager calls xflock4
> * xflock4 calls xscreensaver-command -lock
> 
> While this is happening, suspend continues.
> Suspend is fast, after resume, xscresensaver is still fading to black and
> locking the screen.
> 
> Not sure how to fix that, other than unconfiguring the "fade to black" thing
> in xscreensaver.
> 
> Maurizio: please try to reproduce after disabling the fade-to-black option
> in xscreensaver preferences.
> 
> (I never noticed this, because I use i3lock-xlock-compat instead of
> xscreensaver)

Hi Stefan, Yes I confirm the "fade to black" behavior but only when using xfwm.
With Compton as compositor the issue persists.