【树莓派】RPi desktop系统重启或关机挂起几个问题：plymouth-reboot.service、plymouth-poweroff.service、Deconfiguring network interfaces

在基于intel平台安装的RPi desktop关机或者重启时，会存在挂起的问题，一直卡着不动。

挂起问题有3个：

系统关机时候，停留在：plymouth-poweroff.service

系统重启时候，停留在：plymouth-reboot.service

系统重启时候，有的设备会停留在：Deconfiguring network interfaces

经过查询，看来是官方也存在的问题，之前有人遇到了，也给出了一些如下解决办法，但是我经过多次尝试，看起来并没有生效。

记录部分可能有效的方法如下，用在再次尝试的参考：

挂起问题2.系统重启时候，停留在：plymouth-reboot.service 问题

https://ubuntu-mate.community/t/solved-boot-raspberry-pi-2-image-directly-to-terminal-console/1569/4

---该方法貌似可行，但实践未成功....

https://bugzilla.redhat.com/show_bug.cgi?id=1073778
https://raspberrypi.stackexchange.com/questions/24900/plymouth-on-raspberry-pi

其他参考：
http://happyseeker.github.io/graphic/2016/06/06/crash-when-reboot-on-ft.html
http://www.cnblogs.com/howhy/p/6101125.html
http://www.tuicool.com/articles/UVR3Ijm

--------------------------

挂起问题3：系统重启时候，挂起在这里：Deconfiguring network interfaces

https://lists.debian.org/debian-user/2002/10/msg00870.html

https://ubuntuforums.org/showthread.php?t=1432229

https://ubuntuforums.org/showthread.php?p=10616318&t=1432229

http://www.tuicool.com/articles/aEvmIj

http://psonlinehelp.equallogic.com/V3.0/deconfiguring_a_network_interface.htm

----------------部分代码如下：

case "$1" in
start)
        if init_is_upstart; then
                exit
        fi
        process_options
        check_ifstate

        if [ "$CONFIGURE_INTERFACES" = no ]
        then
            log_action_msg "Not configuring network interfaces, see /etc/default/networking"
            exit
        fi
        set -f
        exclusions=$(process_exclusions)
        log_action_begin_msg "Configuring network interfaces"
        if [ -x /sbin/udevadm ]; then
                if [ -n "$(ifquery --list --exclude=lo)" ] || [ -n "$(ifquery --list --allow=hotplug)" ]; then
                        udevadm settle || true
                fi
        fi
        if ifup -a $exclusions $verbose && ifup_hotplug $exclusions $verbose
        then
            log_action_end_msg $?
        else
            log_action_end_msg $?
        fi
        ;;

stop)
        if init_is_upstart; then
                exit
        fi
        check_network_file_systems
        check_network_swap

        log_action_begin_msg "Deconfiguring network interfaces"
        if ifdown -a --exclude=lo $verbose; then
            log_action_end_msg $?
        else
            log_action_end_msg $?
        fi
        ;;

reload)
        if init_is_upstart; then
                exit
        fi
        process_options

        log_action_begin_msg "Reloading network interfaces configuration"
        state=$(ifquery --state)
        ifdown -a --exclude=lo $verbose || true
        if ifup --exclude=lo $state $verbose ; then
            log_action_end_msg $?
        else
            log_action_end_msg $?
        fi
        ;;

force-reload|restart)
        if init_is_upstart; then
                exit
        fi
        process_options

        log_warning_msg "Running $0 $1 is deprecated because it may not re-enable some interfaces"
        log_action_begin_msg "Reconfiguring network interfaces"
        ifdown -a --exclude=lo $verbose || true
        set -f
        exclusions=$(process_exclusions)
        if ifup -a --exclude=lo $exclusions $verbose && ifup_hotplug $exclusions $verbose
        then
            log_action_end_msg $?
        else
            log_action_end_msg $?
        fi
        ;;

*)
        echo "Usage: /etc/init.d/networking {start|stop|reload|restart|force-reload}"
        exit
        ;;
esac

exit 

# vim: noet ts=

其中第161行前的问题。

（待续）