I found a working wokraround for me on askubuntu.com Type "xset s 0 0" in the terminal
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1039750 Title: Screen is turning off when it must not to Status in “gnome-control-center” package in Ubuntu: Confirmed Bug description: In settings "Brightings and Lock" I'm setting not to turn off the screen, but it turns it off. Sometimes reboot will help, but when I set to turn off the screnn for ex. 1 minute - it don't turn it off. Again, sometimes reboot will help ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: gnome-control-center 1:3.4.2-0ubuntu8 ProcVersionSignature: Ubuntu 3.5.0-11.11-generic 3.5.2 Uname: Linux 3.5.0-11-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.4-0ubuntu8 Architecture: amd64 Date: Tue Aug 21 23:47:45 2012 EcryptfsInUse: Yes ExecutablePath: /usr/bin/gnome-control-center InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120815) ProcEnviron: SHELL=/bin/bash PATH=(custom, no user) LANGUAGE=ru_UA:ru LANG=ru_UA.UTF-8 SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1039750/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
