I found a workaround: I installed apt-get install kubuntu-desktop
which runs without those problem -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in 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 _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp