I forgot to say that, even if kill and restart the gnome power manager, the problem remains.
The only way is to reboot or at least go to sleep mode and come back. -- Gnome Power Manager fails to put display to sleep https://bugs.launchpad.net/bugs/431146 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
