arch重启，帮忙看看！

tyxz888

arch莫名奇妙的突然重启，查看/var/log/messages日志，显示：

Aug 12 08:29:42 arch gdm-binary[1875]: WARNING: gdm_slave_xioerror_handler: Fatal X error - Restarting :0
是什么原因造成，怎么解决？

接着查看相关日志：
less /var/log/gdm/\:0.log  发现以下错误：
[config/dbus] couldn't take over org.x.config: org.freedesktop.DBus.Error.AccessDenied (Connection ":1.28" is not allowed to own the service "org.x.config.display20" due to security policies in the configuration file)