Comment # 1 on bug 1031996 from Stefan Dirsch

Can't reproduce this.

nvidia:

%_sbindir/update-alternatives \
    --force --install %{_libdir}/xorg/modules/extensions/libglx.so libglx.so \
%{_libdir}/xorg/modules/extensions/nvidia/nvidia-libglx.so 100

xorg-x11-server:

%_sbindir/update-alternatives \
    --force --install %{_libdir}/xorg/modules/extensions/libglx.so libglx.so \
%{_libdir}/xorg/modules/extensions/xorg/xorg-libglx.so 50

As you can see NVIDIA has the higher priority. Are you using your own NVIDIA
packages or the manual installer maybe?