Cannot get GRUB boot menu to display more than 3/100ths seconds

[sells59]

   I am having an issue with GNU GRUB configuration or bug.

   Below, are the etc/default/grub and boot/grub/grub.cfg files on my
   system. GRUB version is 2.02.

   Althought I have configured the boot menu timout to 5 seconds, the boot
   menu only flashes on screen briefly for 3/100ths of a second and
   disappears. I have tried all sorts of combinations of configuration
   changes and just cannot seem to do anything to get the boot menu to
   actually stay on the screen.
   I have used a burst frame camera to take a picture of the screen that
   displays and to time how long it is present.

   I have tried holding down keys immediately after entering the BIOS boot
   password.
   I tried holding down: down-arrow, Esc, left-shift, and right-shift.
   Nothing made the boot menu linger.
   I also tried a few times booting while pressing the down-arrow as fast
   as I could. Still the boot menu just flashed by.

   First screen in boot process:
   [1]https://preview.ibb.co/dGc9tp/1.jpg

   The boot menu that displays for 3/100ths of a second:
   [2]https://preview.ibb.co/iT79tp/2.jpg
   Note that the screen says, "The highlighted entry will be executed
   automatically in 5s," but it immediately disappears after only 3/100ths
   of a second.

   Then, it quickly proceeds to:
   [3]https://preview.ibb.co/d2V7eU/3.jpg

   /etc/default/grub ::
# GRUB boot loader configuration

GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="Arch"
GRUB_CMDLINE_LINUX="cryptdevice=/dev/sda5:cryptroot root=/dev/mapper/cryptroot c
rypto=sha512:aes-xts-plain64:512:0:"
GRUB_CMDLINE_LINUX_DEFAULT="quiet loglevel=3"

# Preload both GPT and MBR modules so that they are not missed
GRUB_PRELOAD_MODULES="part_gpt part_msdos"

# Uncomment to enable booting from LUKS encrypted devices
#GRUB_ENABLE_CRYPTODISK=y

# Uncomment to enable Hidden Menu, and optionally hide the timeout count
#GRUB_HIDDEN_TIMEOUT=5
#GRUB_HIDDEN_TIMEOUT_QUIET=true

# Uncomment to use basic console
GRUB_TERMINAL_INPUT=console

# Uncomment to disable graphical terminal
#GRUB_TERMINAL_OUTPUT=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=auto

# Uncomment to allow the kernel use the same resolution used by grub
GRUB_GFXPAYLOAD_LINUX=keep

# Uncomment if you want GRUB to pass to the Linux kernel the old parameter
# format "root=/dev/xxx" instead of "root=/dev/disk/by-uuid/xxx"
#GRUB_DISABLE_LINUX_UUID=true

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

# Uncomment and set to the desired menu colors.  Used by normal and wallpaper
# modes only.  Entries specified as foreground/background.
#GRUB_COLOR_NORMAL="light-blue/black"
#GRUB_COLOR_HIGHLIGHT="light-cyan/blue"

# Uncomment one of them for the gfx desired, a image background or a gfxtheme
#GRUB_BACKGROUND="/path/to/wallpaper"
#GRUB_THEME="/path/to/gfxtheme"

# Uncomment to get a beep at GRUB start
#GRUB_INIT_TUNE="480 440 1"

# Uncomment to make GRUB remember the last selection. This requires to
# set 'GRUB_DEFAULT=saved' above.
#GRUB_SAVEDEFAULT="true"

   /boot/grub/grub.cfg ::
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
insmod part_gpt
insmod part_msdos
if [ -s $prefix/grubenv ]; then
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if loadfont unicode ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=en_US
  insmod gettext
fi
terminal_input console
terminal_output gfxterm
if [ x$feature_timeout_style = xy ] ; then
  set timeout_style=menu
  set timeout=5
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
  set timeout=5
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Arch Linux' --class arch --class gnu-linux --class gnu --class os $me
nuentry_id_option 'gnulinux-simple-d9b29f82-0f88-48e8-97fd-98567f8449f5' {
        load_video
        set gfxpayload=keep
        insmod gzio
        insmod part_msdos
        insmod ext2
        set root='hd0,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//dis
address@hidden,msdos1' --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 
--hint-baremetal=ahci0,
msdos1  24d7cf20-7239-476e-8144-8fa204bea41f
        else
          search --no-floppy --fs-uuid --set=root 24d7cf20-7239-476e-8144-8fa204
bea41f
        fi
        echo    'Loading Linux linux ...'
        linux   /vmlinuz-linux root=UUID=d9b29f82-0f88-48e8-97fd-98567f8449f5 rw
 cryptdevice=/dev/sda5:cryptroot root=/dev/mapper/cryptroot crypto=sha512:aes-xt
s-plain64:512:0: quiet loglevel=3
        echo    'Loading initial ramdisk ...'
        initrd  /intel-ucode.img /initramfs-linux.img
}
submenu 'Advanced options for Arch Linux' $menuentry_id_option 'gnulinux-advance
d-d9b29f82-0f88-48e8-97fd-98567f8449f5' {
        menuentry 'Arch Linux, with Linux linux' --class arch --class gnu-linux
--class gnu --class os $menuentry_id_option 'gnulinux-linux-advanced-d9b29f82-0f
88-48e8-97fd-98567f8449f5' {
                load_video
                set gfxpayload=keep
                insmod gzio
                insmod part_msdos
                insmod ext2
                set root='hd0,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1
275//address@hidden,msdos1' --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 
--hint-baremeta
l=ahci0,msdos1  24d7cf20-7239-476e-8144-8fa204bea41f
                else
                  search --no-floppy --fs-uuid --set=root 24d7cf20-7239-476e-814
4-8fa204bea41f
                fi
                echo    'Loading Linux linux ...'
                linux   /vmlinuz-linux root=UUID=d9b29f82-0f88-48e8-97fd-98567f8
449f5 rw cryptdevice=/dev/sda5:cryptroot root=/dev/mapper/cryptroot crypto=sha51
2:aes-xts-plain64:512:0: quiet loglevel=3
                echo    'Loading initial ramdisk ...'
                initrd  /intel-ucode.img /initramfs-linux.img
        }
        menuentry 'Arch Linux, with Linux linux (fallback initramfs)' --class ar
ch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux
-fallback-d9b29f82-0f88-48e8-97fd-98567f8449f5' {
                load_video
                set gfxpayload=keep
                insmod gzio
                insmod part_msdos
                insmod ext2
                set root='hd0,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1
275//address@hidden,msdos1' --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 
--hint-baremeta
l=ahci0,msdos1  24d7cf20-7239-476e-8144-8fa204bea41f
                else
                  search --no-floppy --fs-uuid --set=root 24d7cf20-7239-476e-814
4-8fa204bea41f
                fi
                echo    'Loading Linux linux ...'
                linux   /vmlinuz-linux root=UUID=d9b29f82-0f88-48e8-97fd-98567f8
449f5 rw cryptdevice=/dev/sda5:cryptroot root=/dev/mapper/cryptroot crypto=sha51
2:aes-xts-plain64:512:0: quiet loglevel=3
                echo    'Loading initial ramdisk ...'
                initrd  /initramfs-linux-fallback.img
        }
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
menuentry "System restart" {
        echo "System rebooting..."
        reboot
}
menuentry "System shutdown" {
        echo "System shutting down..."
        halt
}
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

References

   1. https://preview.ibb.co/dGc9tp/1.jpg
   2. https://preview.ibb.co/iT79tp/2.jpg
   3. https://preview.ibb.co/d2V7eU/3.jpg