如何调试 Xubuntu 12.04（全新安装）的问题，该问题在登录后等待约 30 秒处于空闲状态？
登录屏幕正确延迟。登录后，我获得了桌面背景，但没有面板或自动启动应用程序。
这似乎不是身份验证/pam 问题，因为我可以在图形会话仍然卡住的情况下毫不延迟地在控制台登录。当我查看 htop 时，没有磁盘或 CPU 活动，也没有任何进程的明显重生。中显然没有什么问题.xsession-errors。最有趣的错误：
openConnection: connect: No such file or directory
cannot connect to brltty at :0
WARNING: gnome-keyring:: couldn't connect to: /tmp/keyring-wFn4VR/pkcs11: No such file or directory
...
(polkit-gnome-authentication-agent-1:2131): polkit-gnome-1-WARNING **: Failed to
register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The nam
e org.gnome.SessionManager was not provided by any .service files
** Message: applet now removed from the notification area
** Message: using fallback from indicator to GtkStatusIcon
...
(xfce4-indicator-plugin:2176): libindicator-WARNING **: IndicatorObject …