xfce doesn't trigger the error either, so another workaround seems to work too:
apt-get install xubuntu-desktop -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1509846 Title: lightdm crashes on window open in Ubuntu 15.10 intel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1509846/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs