Does it happen with simple password? like if you "sudo passwd <user>" and set "one" does it log in using "ONE"? Can you also add the journalctl log after getting the issue and the output of "dpkg -l | grep pam"
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1828116 Title: Password works uppercase and lowercase Status in gdm3 package in Ubuntu: Incomplete Status in gnome-shell package in Ubuntu: Incomplete Bug description: When I log in on the console, I can type my password either uppercase or lowercase. I can log in regardless. $ uname -a 4.15.0-48-generic #51-Ubuntu SMP Wed Apr 3 08:28:49 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux Ubuntu 18.04 patched as of today. $ sudo cat /etc/shadow | grep $USER ...:$6$... --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2019-02-06 (94 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) NonfreeKernelModules: nvidia_modeset nvidia Package: gdm3 3.28.3-0ubuntu18.04.4 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 4.15.0-48.51-generic 4.15.18 Tags: bionic Uname: Linux 4.15.0-48-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1828116/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp