I recently had to downgrade sddm because of bug 633920. After I did my /etc/sddm.conf was replaced by the default config shipped with the package. No etc-update. Just downgrade and the config gets overwritten. Reproducible: Always Steps to Reproduce: 1. Install sddm-0.16.0 2. Make changes to /etc/sddm.conf 3. Mask sddm-0.16.0 4. Re-emerge sddm Actual Results: The config gets replaced by the default one. Expected Results: I can use etc-update to manage the diff between configs.
Maybe a duplicate of bug 464662?