Ubuntu 14.04. Brightness & Lock settings are to turn off screen after 10 minutes and lock screen after 30 minutes. 50% of the time, when I wake my computer from suspend, the login field to enter my password is missing. Quite annoying. I have to CTRL + ALT + 3 to get to another.... shell? (still new-ish to Linux), log in and run:
sudo service lightdm restart
Where can I look to see what is going wrong. Is there a lightdm log of some kind?