Comment 15 for bug 1326740

ok, here's the output you requested: Keep in mind that I'm actually using a _Desktop_ PC, but it seems to be the same problem.

$ grep Exec ~/.config/autostart/light-locker.desktop
Exec=light-locker --lock-after-screensaver=0 --lock-on-suspend --no-late-locking

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[ Note that this is when the "Log on suspend" switch is set to "on" (I'm assuming that this "enabled" state is the desired ultimate setting before trying to suspend.)

When "Log on suspend" switch is set to "off", however, then the output looks like this:
$ grep Exec ~/.config/autostart/light-locker.desktop
Exec=light-locker --lock-after-screensaver=0 --no-lock-on-suspend --no-late-locking

[For all subsequent output listed in this comment, "Lock on suspend" is set to "on", and left that way ]
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$ grep Exec ~/.config/autostart/screensaver-settings.desktop
Exec=xset s 0 dpms 0 0 0

$ ps ux | grep light-locker
b*** 21994 0.0 0.0 18100 1440 pts/1 S+ 02:56 0:00 bash /usr/bin/light-locker-settings
b*** 22005 0.3 0.7 525168 30504 pts/1 Sl+ 02:56 0:01 python /usr/share/light-locker-settings/light-locker-settings/light-locker-settings.py
b*** 22058 0.0 0.2 345596 10640 pts/1 Sl+ 03:01 0:00 light-locker --lock-after-screensaver=0 --lock-on-suspend --no-late-locking
b*** 22078 0.0 0.0 17412 944 pts/0 S+ 03:03 0:00 grep --color=auto light-locker

[I've editted this only to change my user account name to b***)

$xfconf-query -c xfce4-session -l -v | grep Lock
$

$ xfconf-query -c xfce4-power-manager -l -v | grep "dpms\|lock\|logind"
$
[no output from either of these last two.]

$ xset q
[*bunch of other stuff*]
Screen Saver:
  prefer blanking: yes allow exposures: yes
  timeout: 0 cycle: 0
[*bunch of other stuff*]
DPMS (Energy Star):
  Standby: 0 Suspend: 0 Off: 0
  DPMS is Enabled
  Monitor is On

If you need anything else, let me know.