Version:            (using KDE Devel)
Installed from:    Compiled sources
Compiler:          gcc (GCC) 4.1.2 20061115 (prerelease) (SUSE Linux) default gcc on openSuSe 10.2
OS:                Linux

Hello,

I have ATI card x1900xt with proprietary ATI driver running on opensuse 10.2.

I have kde4 recent svn version (the lats one was dated June 22) compiled and running. I'm trying to run kwin with composite opengl extensions enabled above Xgl xserver. Compiz is running just fine with my configuration.

If I add UseTransluency=true option to kwinrc file, kwin crashes during startup = with this option =false works fine but without compositing.

I have navigated in source files, inserted some debug flag messages with "cout" and found the problem place. It is in scene_opengl.cpp file in the constructor:

SceneOpenGL::SceneOpenGL( Workspace* ws )
    : Scene( ws )
    , init_ok( false )
    {
.....
if( !initRenderingContext()) {
        return; // error
}
...
}

here initRenderingContext() method returns false and the constructor does go further.

Inside the initRenderingContext() method the problem is here:
bool SceneOpenGL::initRenderingContext() {
...

if( ctxbuffer == NULL || !glXMakeContextCurrent( display(), glxbuffer, glxbuffer, ctxbuffer )
        || errs.error( true ))
        {
...

}

the glXMakeContextCurrent(..) returns false here; all parameters - display(), glxbuffer and ctxbuffer - are not nulls here. Since this moment I can't analyze things anymore as it goes to the area of drivers and some inner opengl stuff I'm not rather familiar with.

The other important note here is that with the kde4 svn version about 2 month old I could run compositing effects with kwin on the same configuration with the same videocard driver. For that I just had to comment out one "assert false" row and the other row above with the "if' statement in the scene_opengl.cpp in the constructor which prevented it to run further. With this modified sources compiled I could see some effects in action. The current sources do not contain this rows.

I would be glad if kwin composite extensions could work with Xgl with proprietary ATI drivers, I can provide additional debug info, can apply patches and recompile the sources and test the things out - all that can be helpful to make it work.