In October I installed the driver 285.05.09 from Nvidia's site to see if the lighdm work, but had no success (apparently it doesn't load at the boot). So I decided to uninstall the lighdm. Now I reinstalled lighdm in order to post the logs, but the bug was not repeated. Nevertheless, I put the logs here hoping that this may help. Thank you very much.
** Attachment added: ".xsession-errors" https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/868819/+attachment/2589000/+files/.xsession-errors -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/868819 Title: lightdm doesn't start automatically To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/868819/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs