Ok, it turns out that it's a bit more complicated than just having sudo in AUTH_TYPES. That will work to get a plugin installed but then hp-doctor also requires some further adjustment.
The number of users who set up the installer without a root password might be much fewer than the ones who do, but it is still a legitimate choice to make at installation time. Those who do take it are likely to encounter some problem with aspects of hplip.
Ok, it turns out that it's a bit more complicated than just having sudo in AUTH_TYPES. That will work to get a plugin installed but then hp-doctor also requires some further adjustment.
The number of users who set up the installer without a root password might be much fewer than the ones who do, but it is still a legitimate choice to make at installation time. Those who do take it are likely to encounter some problem with aspects of hplip.
Cheers,
Brian.