Give us a link, and we will re-open the question if it really doesn't answer yours.

A bunch of people deciding it is a duplicate closes a question. Another bunch can come in and say it is not, and reopen it.

EDIT:

[I found your question here](https://askubuntu.com/questions/403859/how-to-control-lightdm-power-saving-preferences#403859).

The duplicate status is correct, in the sense the question is the same, but if the answer doesn't work, you have every right to request a re-open. I just cast my vote.