Screen fading, logout dialog banding

[Frank Schoep]

Hello everyone,

Recently I've been getting more and more distracted by the color banding 
visible when logging out. I had never really noticed this before so I checked 
if gksudo and the "lock screen" action are also affected. They aren't.

After closely watching the effects of gksudo, lock-screen and logout it seems 
that all three are using different code to achieve the same effect. Of all 
three my personal preference is the lock-screen one, it's real smooth and 
does not exhibit banding. I'm not sure if the screensaver selection affects 
the lock-screen fade, I've got some OpenGL fireworks set up as screensaver.

Are there reasons for the different implementations in each of the components 
I listed? It would be great if the logout fade could be rewritten to be at 
least as good as gksudo, so the (8-bit?) color banding is gone.

I'm not sure about this, but is there a possibility of introducing a shared 
library which offers a solid base of fullscreen operations like fading? It 
could be set up to provide technical superior implementations if available on 
the X server (backing store / composite / OpenGL)?

I wanted to file a bug report against the logout dialog, but couldn't 
determine in which package it lives. Is it worth filing a bug for this and 
which package should I choose?

With kind regards,

Frank Schoep




(Resent using the correct sender e-mail address, sorry if duped.)