https://bugs.freedesktop.org/show_bug.cgi?id=48417
--- Comment #3 from Doug drt781@yahoo.com 2012-04-09 17:18:30 UTC --- Bug consistently occurs from pressing power button on ASUS monitor. However, less severe than first thought because GNOME 3 screen/power management tools work ok and put monitor into powersaving mode/off eventually without pressing button. Monitor not completely shut off that way; power button shows standby. Wakes without problem from GNOME 3-initiated powersave.
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