Ubuntu 16.04设置开机关机时显示命令详细信息不显示进度

有时候，系统会因为一些问题而卡死，这个时候如果不能查看具体细节，对诊断和解决问题很不利。因此，关掉进度条和动画，显示命令详细信息更好。

解决办法如下：

1. sudo gedit /etc/default/grub， 修改grub配置文件
2. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" 改为GRUB_CMDLINE_LINUX_DEFAULT=“” #"quiet splash" （也就是改为空）
3. 在最后一行，加入GRUB_GFXPAYLOAD_LINUX=None

总体grub文件：

# If you change this file, run 'update-grub' afterwards to update               
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10                                                                 
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="" #"quiet splash"
GRUB_CMDLINE_LINUX=""

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"
GRUB_GFXPAYLOAD_LINUX=None

更新grub配置文件

随后，更新grub：sudo update-grub

GRUB_DEFAULT=0 决定了启动时菜单的选择选项

---

以下内容不一定会发生：

• 修改：sudo gedit /etc/grub.d/10_linux
• 删除以下内容（可能没有，没有则不管）

if ! ${recovery} ; then
      save_default_entry | sed -e "s/^/\t/"

      cat << EOF
       gfxmode \$linux_gfx_mode
EOF
  fi

更新后，可以尝试reboot。正常就好～