[tde-users] Root shell in konsole dies after one failed login attempt

Good Day everyone, I still wonder, after all those years, how to configure root login shell in konsole to ask again and not just die when I mistyped the password. Konsole is launched with the arguments "su --login" or "su --login -c 'mc -c'". 'su' in a USER shell also dies after one login attempt. So, it seems, su needs to be configured. But it is hard for me to see through su/pam configuration. Any help or hint is muchly appreciated. Thanks and kind regards, Stefan