Thanks, I think I've got it, it's indeed (pubring.gpg -> pubring.kbx). Key cache refresh is waiting for a change in pubring.gpg. If you're brave, a test/workaround could be: - Backup /usr/lib64/libzypp.so.1306.4.4 (your .so.version is probably differernt) - `strings /usr/lib64/libzypp.so.1306 | grep pubring` should show a single 'pubring.gpg' - `sed -i 's/pubring\.gpg/pubring.kbx/' /usr/lib64/libzypp.so.1306