[compiz] compiz run on DISPLAY :2 error: No composite extension

[David Reveman]

On Fri, 2007-05-18 at 17:00 +0800, Zhu, Jack wrote:
> I can enable compiz on default DISPLAY :0  on gnome on FC6,  all
> features are OK, but when I set up a DISPLAY :2 with Xnest,  try to
> run compiz in DISPLAY :2, fail, 
> 
> Error info: 
> 
>  
> 
> compiz: No composite extension 
> 
>  
> 
> I check compiz source code: 
> 
> if (!XQueryExtension (dpy,
> 
>                               COMPOSITE_NAME,
> 
>                               &d->compositeOpcode,
> 
>                               &d->compositeEvent,
> 
>                               &d->compositeError))
> 
>     {
> 
>          fprintf (stderr, "%s: No composite extension\n",
> programName);
> 
>          return FALSE;
> 
> }
> 
>  
> 
> NAME
> 
>        XQueryExtension, XListExtensions, XFreeExtensionList - list
> available extensions
> 
> ARGUMENTS
> 
>        display   Specifies the connection to the X server.
> 
>        name      Specifies the extension name.
> 
> DESCRIPTION
> 
>        The  XQueryExtension  function  determines  if  the  named
> extension is present.  If the extension is not
> 
>        present, XQueryExtension returns False;  otherwise,  it
> returns  True.   If  the  extension  is  present,
> 
>        XQueryExtension  returns  the major opcode for the extension to
> major_opcode_return; otherwise, it returns
> 
>        zero.  
> 
>  
> 
>  
> 
> who can help me ?

Xnest simply doesn't support the composite extension that is required to
run compiz. Compiz is a compositing window manager and none of the
effects that compiz plugins provide could be implemented without this X
server extension.

You can use Xgl if you want to run an X server in a window that support
all the extensions required by compiz.

- David