The installation is not clean. You can find the following script in the xfree86-common.postinst. # Just move the Xsession file if it's still around if [ -f /etc/X11/Xsession ]; then mv /etc/X11/Xsession /etc/X11/Xsession.xfree86 fi This action makes a big broken in my system. I can't use startx to start Xwindow -- Best Regards Haifeng Chen