Comment 6 for bug 174408

I doubt it's that. First of all, there are several error messages before starting Xgl.

Second of all, after another reboot I could log-in normally. Xgl actually started, but it was much too slow, so I just uninstalled it.

Now I can log-in, but I have other issues with compiz (other bug). Unless someone else still has the same symptoms, I think it was a temporary settings mess-up.