Per a suggestion on the xubuntu-devel IRC channel, I tested the intel xorg-edgers ppa driver -- to no avail.
Next suggestion was to try a later kernel. First, I did a fresh install of the current vivid daily image and confirmed that problem was still present. Then I installed the latest 3.17 kernel and that did seem to resolve the problem. So for the heck of it, I then installed the latest 3.19 RC and it's working okay with that one too. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1384515 Title: Laptop screen dims on logout To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1384515/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs