A friend asked me to take care of his Lubuntu 14.04 LTS. He is not a computer expert at all so his bug report might not be accurate. Unfortunately I could not reproduce the error while I am at his Lubuntu box.
He reports that when he does not touch the computer for, let's say ten minutes, then it becomes locked and he was not able to give his password, so it hangs and he has to reboot the computer. Unfortunately I did not see this so this description might not be precise.
There is no power management software running on the computer, I checked.
Which menu entry should I check then to disable this locking? I can do command line so that kind of answer is also welcome.