> You could argue that the DPMS settings conflict and that this one
should be removed though.

dpms don't conflict, because they are synced between xfpm and light-
locker-settings.

> Since no service handles the blank times with the switch away from
XScreensaver to light-locker, we decided that light-locker-settings
should take care of it until xfce4-power-manager was ready.

Here lies the problem: Since xfpm does not handle screen blank, one can easily 
break the power source dependent monitor pm of xfpm. Consider following 
situation: User sets up ac timings in xfpm to 10/15 and battery timings to 
7/10. While on battery he decides to reduce this timings and uses 
light-locker-settings to set them to 3/4. Back on ac he wonders why his screen 
goes black after 3 min. He checks light-locker-settings and xfpm and both say 
10/15. 
xset q shows, that xfpm did switch the timings after the power source has 
changed, but since it does not handle screen blanking it is still set to 3.

I guess the question here is, do we want (incomplete) screen blank gui
support for crt monitor users (afaik on lcd monitors screen blank, dpms
standby/suspend/off are all the same), or a consistent monitor pm with
xfpm.

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https://bugs.launchpad.net/bugs/1393767

Title:
  [trusty] light-locker-settings may prevent xfpm to apply power source
  dependent monitor power management

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