Hi, all, I recently upgraded from Rh6.2 to RH7.1, BUT: the gdm window will always kick me out even if I chose the fail-safe option. from /var/log/messages, I can see: May 21 22:35:24 stag gdm(pam_unix)[1158]: session opened for user ywangz by (uid=0) May 21 22:35:24 stag gdm[1158]: gdm_slave_session_start: ywangz on :0 May 21 22:35:29 stag gdm(pam_unix)[1158]: session closed for user ywangz May 21 22:35:29 stag gdm[1158]: gdm_auth_user_remove: /home/ywangz is not owned by uid 0. May 21 22:35:29 stag gdm[1158]: gdm_auth_user_remove: Ignoring suspiciously looking cookie file /home/ywangz/.Xauthority My /etc/pam.d/gdm looks normal: #%PAM-1.0 auth required /lib/security/pam_stack.so service=system-auth auth required /lib/security/pam_nologin.so account required /lib/security/pam_stack.so service=system-auth password required /lib/security/pam_stack.so service=system-auth session required /lib/security/pam_stack.so service=system-auth session optional /lib/security/pam_console.so If I switch to xdm whose pam config is the same as above, I could log in successfully, so I am really confused. what am I missing, with gdm or pam? thanks a lot yao