Luke Kenneth Casson Leighton composed on 2018-06-03 11:22 (UTC+0100):
9th major difference: there are signs that the directory /usr/share/locale-langpack does not exist:
+access("/usr/share/locale-langpack", F_OK) = -1 ENOENT (No such file or directory)
also, one of the systems appears to have been set to plastik style, the other to keramik
at that point the differences becomes significant (line 2603) because the styles do radically different things. one is looking for /etc/tqt3/qtrc and finds it, the other doesn't look for it.
I recognized all those fontconfig/installed fonts/not installed fonts to be irrelevant. The fonts unit worked find via kcontrol.
I've updated https://bugs.pearsoncomputing.net/show_bug.cgi?id=2821 with the cause: having yast2-fonts installed breaks the finding of module fonts.