Hi Simon,
Then it is weird to me, when I click on the activities button, new created 
window which shows all applications logos displays good.
But when I open any applications like (Calculator), newly created window only 
shows garbage.
I tried to dump the window pixmap buffer(Calculator application), it renders 
correctly. If I use this buffer in swap function as the source(backleft buffe), 
then Calculator displays good.
I thought that the window manager is missing or not compositing correctly, but 
if the composite job is in hand of gnome-shell, seems to me that gnome-shell is 
not working properly to do the composite.
Do you have hint to solve this problem ?
 Best Regards

Kevin 

     On Friday, February 13, 2015 5:47 PM, Simon McVittie 
<simon.mcvit...@collabora.co.uk> wrote:
   

 On 13/02/15 04:29, Kevin Master wrote:
>  * Should mutter also start to support gnome-shell working ?

No. The /usr/bin/gnome-shell executable loads libmutter.so.0 as a shared 
library, just like /usr/bin/mutter does. You should not (and cannot) run 
the gnome-shell and mutter executables in the same X session - only one 
of them at a time can be your window manager.

>  * Where the composite happens, in gnome-shell process or in mutter
>    process ?

The gnome-shell process does the window management and compositing, 
using code from libmutter.so.0.

    S

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