In order to prevent things like screen dimming by xfce4-power-manager, Parole needs to not only inhibit the screensaver when playing back videos, but also power management through /org/freedesktop/PowerManagement/Inhibit. This is related to bug https://bugzilla.xfce.org/show_bug.cgi?id=14687
Created attachment 8833 Patch to inhibit power management in addition to screen saving I originally pondered to add an additional option for this, in the end I felt it would be a bit overkill. But if you feel we should add a boolean xfconf prop for powermanagement in addition to screensaving that should be a trivial task based on the existing patch. Please test/review (d-feet helps ;))!
Created attachment 8834 Cleaned up patch Prevented a warning and fixed a typo in addition.
Simon Steinbeiss referenced this bugreport in commit f32c7080733a3e1b43ab2196039f1a7dee80fc42 Inhibit power management during video playback (Bug #15747) https://git.xfce.org/apps/parole/commit?id=f32c7080733a3e1b43ab2196039f1a7dee80fc42
Looks good to me. Thanks for the patch!