found more info on the web, read other instances of people with the same problem after a kernel update. Reinstalling the nvidia driver fixes the problem.
-- X Crashes While Opening Screensaver Window https://bugs.launchpad.net/bugs/150022 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
