Having this issue as well. Running Lubuntu 15.04 with custom LXQt installation - two screens. Seems like this behaviour is caused by lightdm.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1426664 Title: After booting to lightdm-gtk-greeter, get a white screen until I click a mouse button To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1426664/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
