ps3mediaserver/ps3mediaserver — comment on commit a7627e76e0e1eaecde679fd99164cf8336605a43
File:  line 0
By Raptor399:

If the logback.xml cannot be found, logging will fall back to its default form.
In fact, it was doing just that before this fix. ;-)

If you start the jar manually you will have to make sure that the logback.xml is in the same directory as where the jar is (which would be the target directory for the example you provide).

The best way to avoid having to do that is to install PMS properly, since the assembly will make sure the file is in the correct spot with the packaged jar file.