Correction to the patch-0002 report: after a reboot the Hub icon asks for a password AND the correct free (desktop) password is rejected there, while desktop sign-in accepts it. Patch 0002/0003 explain the icon prompt (legacy hub_manual_logout cookie; fixed in 0003), but the rejection itself means verify_system_password() never gets a conclusive crypt answer in the Hub unit and its PAM fallback cannot load either: on NixOS a bare libcrypt.so.1/libpam.so.0 resolves through LD_LIBRARY_PATH or not at all (or to glibc's failure-token stub), and until now every stage failed silently into a generic 'Incorrect password'.
password-model.nix now puts pkgs.libxcrypt and pkgs.pam on sovran-hub-web's LD_LIBRARY_PATH so both the crypt fallbacks and PAM can actually load. verify_system_password() now logs, journal-visible and never containing a password or hash: the shadow hash scheme, every libcrypt source tried and whether it loaded, and PAM's service + return code when it has to decide.
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