registry team mailing list archive

[Nikil Mehta <nikil.mehta@xxxxxxxxx>]

1. This problem still exists.

2. It appears that the origin of the problem is gnome-screensaver.  By
either inhibiting the screensaver (gnome-screensaver -i) or outright
removing the gnome-screensaver package, this problem goes away.  Why
that is, I have no idea.  Monitoring dbus after issuing 'xset dpms force
off', a couple of screensaver related messages pop up:

method call sender=:1.10 -> dest=org.gnome.ScreenSaver serial=3223 path=/; interface=org.gnome.ScreenSaver; member=UnThrottle
   uint32 2035929630

and

method call sender=:1.10 -> dest=org.gnome.ScreenSaver serial=3300 path=/; interface=org.gnome.ScreenSaver; member=Throttle
   string "Power screensaver"
   string "Display DPMS activated"

Because the monitor is off I can't tell exactly when the messages arrive
(and thus which message correlates to the backlight coming back on), but
I would bet one of these points the way to the source of the problem.
The documentation for Throttle/UnThrottle isn't exactly clear, but I
would think a developer might be able to track down the issue, if they
were so motivated.

-- 
[Lucid] Laptop only remains DPMS off for 2 seconds
https://bugs.launchpad.net/bugs/447728
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Administrators, which is the registrant for gnome-power.