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timeout_setting.md

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timeout setting

Sometimes the OS stop at the grub items even you set default timeout to a small positive number. Check your /boot/grub/grub.cfg you can find

if [ "${recordfail}" = 1 ] ; then
  set timeout=-1 #GRUB_RECORDFAIL_TIMEOUT
else
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=menu
    set timeout=10
  # Fallback normal timeout code in case the timeout_style feature is
  # unavailable.
  else
    set timeout=10 #GRUB_TIMEOUT
  fi
fi

You will notice timeout is set at three statements, For the first one it's depends on the virable recordfial which will be found in /boot/grub/grubenv. Changing the grub.cfg and grubenv is not recommanded because it will change back everytime after you update grub or caused by kernel updating.

Modify the templates the update using is my solution:

GRUB_TIMEOUT=10 in /etc/default/grub

set timeout=${GRUB_RECORDFAIL_TIMEOUT:--1} in /etc/grub.d/00_header

Be care for the --1