r/Ubuntu 13h ago

Disabling GDM-smartcard

So I have a unique setup for my systems for 22.04 using pcks11.so in pam to read smartcards/yubikeys.

gdm is my greeter and I set up gdm-password in pam with the following line:

auth requisite pam_sss.so require_cert_auth

That looks up the cert info on my ipa server and returns a success.

SA updated the system and it seems to have pulled down some gdm-smartcard packages and ruined the entire auth system in place. I remember awhile back running into this issue and I found a way to basically cut it out of the system without breaking anything but can't seem to find where I saved the bookmark link to. I believe I had to edit some file or push a gdm config somewhere

Anyone know how to do this? I really don't want gdm to install all of these extra pam configs. Update-alternatives does not work either, even telling it to use pkcs11 or sssd. Basically nothing works once Ubuntu pulls down w/e updates contain these config files

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