在基於intel平台安裝的RPi desktop關機或者重啟時，會存在掛起的問題，一直卡着不動。
掛起問題有3個：
系統關機時候，停留在：plymouth-poweroff.service
系統重啟時候，停留在：plymouth-reboot.service
系統重啟時候，有的設備會停留在：Deconfiguring network interfaces
經過查詢，看來是官方也存在的問題，之前有人遇到了，也給出了一些如下解決辦法，但是我經過多次嘗試，看起來並沒有生效。
記錄部分可能有效的方法如下，用在再次嘗試的參考：
掛起問題2.系統重啟時候，停留在：plymouth-reboot.service 問題
https://ubuntu-mate.community/t/solved-boot-raspberry-pi-2-image-directly-to-terminal-console/1569/4
---該方法貌似可行，但實踐未成功....
https://bugzilla.redhat.com/show_bug.cgi?id=1073778
https://raspberrypi.stackexchange.com/questions/24900/plymouth-on-raspberry-pi
其他參考：
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
--------------------------
掛起問題3：系統重啟時候，掛起在這里：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
----------------部分代碼如下：
case "$1" in start) if init_is_upstart; then exit 1 fi process_options check_ifstate if [ "$CONFIGURE_INTERFACES" = no ] then log_action_msg "Not configuring network interfaces, see /etc/default/networking" exit 0 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 0 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 $? fi ;; reload) if init_is_upstart; then exit 1 fi process_options log_action_begin_msg "Reloading network interfaces configuration" state=$(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 1 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 1 ;; esac exit 0 # vim: noet ts=8
其中第161行前的問題。
（待續）