Comment 5 for bug 1292041

Which package implements the new lock screen? The regression is in this package.

The old screensaver (gnome-screensaver?) used to power the monitor off as soon you manually activate the lock screen (eg when you press the key combination to lock the screen).

The new 14.04 screen locker (which package implements this?) does NOT power the monitor off when you manually activate the lock screen. Additionally, it blocks the monitor powering off indefinitely (apparently: I've tested it for more than three hours to show that the monitor does not turn off) until you enter the password and press the enter key. At this point, the lock screen restores the normal screen, and shortly thereafter the monitor is powered off briefly (by gnome-screensaver?) before immediately turning back on.

If, however, you leave the screen for the configured time before it powers off, the monitor *does* power off. The regression is only when you activate the lock screen manually.