"login" and "su" have "auth sufficient pam_self.so" but a screen
locker is supposed to ask for password regardless.

pam_unix(8) requires root priveleges to access master.passwd(5),
so try authenticating via setuid helper first.

--- pam/hyprlock.orig	2026-04-18 09:44:05 UTC
+++ pam/hyprlock
@@ -1,5 +1,4 @@
-# PAM configuration file for hyprlock
-# the 'login' configuration file (see /etc/pam.d/login)
+# PAM configuration for hyprlock. Only uses auth facilities.
 
-auth        include     login
+auth        include     unix-selfauth
 
--- src/auth/Pam.cpp.orig	2026-04-21 11:41:16 UTC
+++ src/auth/Pam.cpp
@@ -64,11 +64,6 @@ CPam::CPam() {
     static const auto PAMMODULE = g_pConfigManager->getValue<Hyprlang::STRING>("auth:pam:module");
     m_sPamModule                = *PAMMODULE;
 
-    if (!std::filesystem::exists(std::filesystem::path("/etc/pam.d/") / m_sPamModule)) {
-        Log::logger->log(Log::ERR, R"(Pam module "/etc/pam.d/{}" does not exist! Falling back to "/etc/pam.d/su")", m_sPamModule);
-        m_sPamModule = "su";
-    }
-
     m_username = getUsernameForCurrentUid();
 
     m_sConversationState.waitForInput = [this]() { this->waitForInput(); };