Проблема с настройкой GRUB

$ inxi -S
System:    Host: desk-22linldme Kernel: 4.19.0-18-amd64 x86_64 bits: 64 Desktop: Cinnamon 5.0.7 Distro: LMDE 4 Debbie 

$ !10
apt list --installed | grep grub
 
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
 
grub-common/oldstable,oldstable,now 2.02+dfsg1-20+deb10u4 amd64 [установлен]
grub-customizer/oldstable,now 5.1.0-1 amd64 [установлен]
grub-pc-bin/oldstable,oldstable,now 2.02+dfsg1-20+deb10u4 amd64 [установлен]
grub-pc/oldstable,oldstable,now 2.02+dfsg1-20+deb10u4 amd64 [установлен]
grub2-common/oldstable,oldstable,now 2.02+dfsg1-20+deb10u4 amd64 [установлен]
grub2-splashimages/oldstable,oldstable,now 1.0.1+nmu1 all [установлен]
grub2-theme-mint-2k/debbie,debbie,now 1.2.0 all [установлен]
grub2-theme-mint/debbie,debbie,now 1.2.2 all [установлен]

 
$ !39
cat /etc/default/grub
# 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_TIMEOUT="5"
GRUB_DISTRIBUTOR="`lsb_release -i -s 2> /dev/null || echo Debian`"
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
GRUB_BACKGROUND="/boot/grub/themes/linuxmint/background.png"
 
# 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="1920x1080x24"
 
# 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_THEME="/boot/grub/themes/linuxmint-2k/theme.txt"
 
export GRUB_COLOR_NORMAL="light-gray/black"
export GRUB_COLOR_HIGHLIGHT="green/red"
export GRUB_MENU_PICTURE="/boot/grub/themes/linuxmint/background.png"

sudo update-grub