Hello Achim,
Found this one came samba-4.0.9/source3/utils/testparm.c
374 load_case_tables();
375 /*
376 * Set the default debug level to 2.
377 * Allow it to be overridden by the command line,
378 * not by smb.conf.
379 */
380 lp_set_cmdline("log level", "2");
Hmm perhaps a bit related, not very sure.
--
Regards,
Jones