I also had a problems after today xserver-xorg-core update, but in mine case problem was with Wine applications, i couldn't start them (even winecfg utility), because X server was restarting to the login screen.
The resolution was simple, and I have found it on Ubuntu forums, nvidia binary drivers reinstallation resolved the problem :) -- xserver-xorg-core update breaks java & wxwidgets apps https://bugs.launchpad.net/bugs/183969 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
