Description of problem:
Kwin crashe if I try to use Opengl. 


Version-Release number of selected component (if applicable):

Mageia 3


Steps to Reproduce:

1.In systemsetting -> Desktop Effects i got a message like this 

Desktop effects are not available on this system due to the following technical issues:

OpenGL compositing (the default) has crashed KWin in the past.
This was most likely due to a driver bug.
If you think that you have meanwhile upgraded to a stable driver,
you can reset this protection but be aware that this might result in an immediate crash!
Alternatively, you might want to use the XRender backend instead.

2. Try to reactive it and the crash window appear with this information:

Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[KCrash Handler]
#5  0x00007f88012bfafe in glXGetFBConfigs () from /usr/lib64/fglrx/libGL.so.1
#6  0x00007f880576e6b8 in KWin::GlxBackend::initDrawableConfigs() () from /lib64/libkdeinit4_kwin.so
#7  0x00007f880576ee2a in KWin::GlxBackend::init() () from /lib64/libkdeinit4_kwin.so
#8  0x00007f8805764cf7 in KWin::SceneOpenGL::createScene() () from /lib64/libkdeinit4_kwin.so
#9  0x00007f8805753dc5 in KWin::Compositor::slotCompositingOptionsInitialized() () from /lib64/libkdeinit4_kwin.so
#10 0x00007f88057541f7 in KWin::Compositor::setup() () from /lib64/libkdeinit4_kwin.so
#11 0x00007f8805754a5f in KWin::Compositor::slotConfigChanged() () from /lib64/libkdeinit4_kwin.so
#12 0x00007f88007f262f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /lib64/libQtCore.so.4
#13 0x00007f88056e30ea in KWin::Workspace::slotReconfigure() () from /lib64/libkdeinit4_kwin.so
#14 0x00007f88056e91ca in KWin::Workspace::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libkdeinit4_kwin.so
#15 0x00007f88007f262f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /lib64/libQtCore.so.4
#16 0x00007f88007f193c in QObject::event(QEvent*) () from /lib64/libQtCore.so.4
#17 0x00007f87ff97230c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#18 0x00007f87ff97678a in QApplication::notify(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#19 0x00007f8804ecb0f6 in KApplication::notify(QObject*, QEvent*) () from /lib64/libkdeui.so.5
#20 0x00007f88007dd20e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQtCore.so.4
#21 0x00007f880080de32 in QTimerInfoList::activateTimers() () from /lib64/libQtCore.so.4
#22 0x00007f880080dfe8 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#23 0x00007f87ffa1316f in QEventDispatcherX11::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtGui.so.4
#24 0x00007f88007dbf5f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#25 0x00007f88007dc1e8 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#26 0x00007f88007e0fd8 in QCoreApplication::exec() () from /lib64/libQtCore.so.4
#27 0x00007f8805709c6a in kdemain () from /lib64/libkdeinit4_kwin.so
#28 0x00007f8805311ba5 in __libc_start_main () from /lib64/libc.so.6
#29 0x0000000000400751 in _start ()





Reproducible: 

Steps to Reproduce: