我遇到登录循环，无法登录。
我尝试重新安装 lightdm、ubuntu-desktop，但没有帮助。我安装了 gdm，并将其用作我的默认设置一段时间，以查看是否是 lightdm 问题。
但这里似乎在我登录时启动的某些东西上有 3 次错误的密码尝试。我认为我的 sudoers 文件是正确的。
这是我的 auth.log -
May 23 14:52:01 ubuntu-desktop lightdm: pam_unix(lightdm:session): session closed for user lightdm
May 23 14:52:02 ubuntu-desktop lightdm: pam_unix(lightdm:session): session opened for user angad by (uid=0)
May 23 14:52:02 ubuntu-desktop lightdm: pam_ck_connector(lightdm:session): nox11 mode, ignoring PAM_TTY :0
May 23 14:52:02 ubuntu-desktop sudo: pam_unix(sudo:auth): conversation failed
May 23 14:52:02 ubuntu-desktop sudo: pam_unix(sudo:auth): auth could not identify password for [angad]
May 23 14:52:02 ubuntu-desktop sudo: pam_unix(sudo:auth): conversation failed
May 23 14:52:02 ubuntu-desktop sudo: pam_unix(sudo:auth): auth could not identify password for [angad]
May 23 14:52:02 ubuntu-desktop sudo: pam_unix(sudo:auth): conversation failed
May 23 14:52:02 ubuntu-desktop sudo: pam_unix(sudo:auth): auth could not identify password for [angad]
May 23 14:52:02 ubuntu-desktop sudo: angad : 3 incorrect password attempts ; TTY=unknown ; PWD=/home/angad ; USER=root ; COMMAND=/bin/bash
May 23 14:52:05 ubuntu-desktop lightdm: pam_unix(lightdm:session): session closed for user angad
May 23 14:52:06 ubuntu-desktop lightdm: pam_unix(lightdm:session): session opened for user lightdm by (uid=0)
May 23 14:52:06 ubuntu-desktop lightdm: pam_ck_connector(lightdm:session): nox11 mode, ignoring PAM_TTY :0
May 23 14:52:07 ubuntu-desktop lightdm: pam_succeed_if(lightdm:auth): requirement "user ingroup nopasswdlogin" not met by user "angad"
May 23 14:52:07 ubuntu-desktop dbus[936]: [system] Rejected send message, 2 matched rules; type="method_call", sender=":1.166" (uid=104 pid=7935 comm="/usr/lib/indicator-datetime/indicator-datetime-ser") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.17" (uid=0 pid=1426 comm="/usr/sbin/console-kit-daemon --no-daemon ")