I was affected as well but after I upgraded with the software from xorg- edgers PPA, and I selected lightdm again, the problem has gone.
So I think that this isn't a problem of lightdm rather it's a problem of xorg related software. If you want to upgrade too, you should refer to https://launchpad.net /~xorg-edgers/+archive/ppa -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1070150 Title: Intermittent low graphics mode with Intel HD graphics To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/1070150/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
