Ubuntu
gdm3 package

  1. Bug #1240336
  2. Comment #83

Comment 83 for bug 1240336

Revision history for this message
Christophe Gras (christophe-gras) wrote : Re: After release upgrade, the user looses permissions for several basic actions in the system

Got same issue after an upgrade from Ubuntu 14.04 to 16.04 and the following actions solved the problem :

sudo pam-auth-update --force
sudo vi/etc/pam.d/lightdm

=> add following lines at the end :
 session required pam_loginuid.so
 session required pam_systemd.so

sudo reboot