桌面系统崩溃问题已经发生两次，隔得挺远，这次我去查了下日志 /var/log/auth.log
Jul 5 16:40:09 nesteiner sshd[935]: Server listening on :: port 22.
Jul 5 16:40:10 nesteiner gdm-password]: pam_unix(gdm-password:session): session opened for user steiner by (uid=0)
Jul 5 16:40:10 nesteiner systemd-logind[792]: New session 387 of user steiner.
Jul 5 16:40:12 nesteiner systemd-logind[792]: Removed session 2.
Jul 5 16:40:13 nesteiner polkitd(authority=local): Registered Authentication Agent for unix-session:387 (system bus name :1.715 [/usr/bin/gnome-shell], object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale zh_CN.UTF-8)
Jul 5 16:40:34 nesteiner gnome-keyring-daemon[18932]: asked to register item /org/freedesktop/secrets/collection/login/1, but it's already registered
这里他只是说Removed Session 2，我该怎么得到更详细的信息来排查错误？