I'm using debian sid, and yesterday I did a safe-upgrade. After booting the pc again gdm hangs during boot. I tried using slim and it worked but xfwm4 and xfdesktop didn't work, no xfce app except the panel works, there was no GTK+ theme, it was really slow and there were like 10 xfwm4 and 10 xfdesktop processes running at the same time. Openbox didn't work either. Does anyone know how to fix this, I have no idea what's the problem.