Same problem on Ubuntu GNOME 14.04 64bits also Workaround is to restart gnome-settings-daemon at session startup : http://askubuntu.com/questions/450767/multi-display-issue-with-ubuntu-gnome-14-04/457100?iemail=1&noredirect=1#457100
Same problem on Ubuntu GNOME 14.04 64bits also daemon at session startup : http:// askubuntu. com/questions/ 450767/ multi-display- issue-with- ubuntu- gnome-14- 04/457100? iemail= 1&noredirect= 1#457100
Workaround is to restart gnome-settings-