This problem is with gnome-screensaver package. With xscreensaver the monitor turns on in a correct way.
** Changed in: xorg (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/901202 Title: Monitor brightness is 0 after DPMS off To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/901202/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp