# 1) Edit grub with vi sudo vi /etc/default/grub # 2) Add or modify the following part GRUB_RECORDFAIL_TIMEOUT="5" # 3) Update sudo update-grub The reason is If you look at "/etc/grub.d/00_header" if [ \$grub_platform = efi ]; then set timeout=${GRUB_RECORDFAIL_TIMEOUT:-30} if [ x\$feature_timeout_style = xy ] ; then set timeout_style=menu fi fi Because it's like this.