linux=$(echo "$mylist" | version_sort -r | head -n 1)

--- /etc/grub.d/10_linux
+++ /etc/grub.d/10_linux_slackware
@@ -227,7 +227,7 @@
   done
 
   initrd=
-  if test -n "${initrd_early}" || test -n "${initrd_real}"; then
+  if test -n "${initrd_early}" || test -n "${initrd_real}" && test -z `echo $basename | grep huge` ; then
     initrd="${initrd_early} ${initrd_real}"
 
     initrd_display=

Installing for x86_64-efi platform.
EFI variables are not supported on this system
EFI variables are not supported on this system
grub-install: error: efibootmgr failed to register the boot entry: No such file or directory.

Installing for x86_64-efi platform.
Installation finish. No error reported.

GRUB_GFXMODE=800x600x32
GRUB_GFXPAYLOAD_LINUX=800x600x32

cat << EOF
if [ "\$grub_platform" = "efi" ]; then
  insmod bli
fi
EOF

mount -t efivarfs none /sys/firmware/efi/efivars

#!/usr/bin/bash
cd /
# Re-install GRUB if possible.
grubefi() {
    # Is /boot/efi mounted? then EFIMOUNTED is the path to the EFI partition, else null.
    EFIMOUNTED=$(findmnt -no source /boot/efi)
    # If /boot/efi is not mounted, mount it
    [ ! "$EFIMOUNTED" ] && mount /boot/efi
    unset EFI
    if [ -d /sys/firmware/efi ]; then
        # Is /sys/firmware/efi/efivars mounted?
        EFIVARSMOUNTED=$(findmnt /sys/firmware/efi/efivars)
        # If /sys/firmware/efi/efivars is not mounted, mount it.
        [ ! "$EFIVARSMOUNTED" ] &&  mount -t efivarfs none /sys/firmware/efi/efivars
        EFI=yes
    fi
    # we will replace the last installed Slint OS loader in the ESP, if any.
    # There should be one, but you never know.
    find /boot/efi/EFI -name "slint*" -exec  ls -1t -d {} +|sed "s;.*/;;"|head -n1 > "$BOOTLOADERID"
    blid=slint-$(cat "$SLINTVERSION")
    [ -s "$BOOTLOADERID" ] && blid=$(cat "$BOOTLOADERID")
    if [ "$EFI" ]; then
        echo grub-install --bootloader-id="$blid" /dev/"$DRIVENAME"
        grub-install --bootloader-id="$blid" /dev/"$DRIVENAME"
        echo "$?" > "$RETEFI"
    else
    echo grub-install --bootloader-id="blid" --target=x86_64-efi --no-nvram /dev/"$DRIVENAME"
        grub-install --bootloader-id="$BOOTLOADERID" --target=x86_64-efi --no-nvram /dev/"$DRIVENAME"
        echo "$?" > "$RETEFI"
    fi
}
grublegacy() {
    # We reinstall GRUB in Legacy mode unless the root partition be in a GPT
    # and there be no BIOS boot partition in the drive of the root partition.
    PARTTYPE=$(lsblk -lno pttype "$DRIVEPATH"|head -n 1)
    # How many BIOS Boot partitions in this drive?
    BIOSBOOTCOUNT=$(lsblk -lno name,parttypename "$DRIVEPATH"|grep -c 'BIOS boot$')
    [ "$PARTTYPE" = "gpt" ] && [ "$BIOSBOOTCOUNT" -eq 0 ] && return
    echo grub-install --target=i386-pc "$DRIVEPATH"
    grub-install --target=i386-pc "$DRIVEPATH"
    echo "$?" >"$RETLEGACY"
}
# Main
LANG=C
RETEFI=$(mktemp)
RETLEGACY=$(mktemp)
BOOTLOADERID=$(mktemp)
SLINTVERSION=$(mktemp)
unset blid
cut -d" " -f 2 /etc/slint-version >"$SLINTVERSION"
# Grub needs to be reinstalled in the drive of the root partition, if installed there.
# If grub is not installed in this drive, bail out, as another OS loader than ours is used
[ ! -f /boot/grub/grub.cfg ] && exit
[ ! -d /boot/grub/x86_64-efi ] && [ ! -d /boot/grub/i386-pc ] && exit
# We will reinstall GRUB in drive of the root partition
# Find the path of the root partition, the name and path of its drive. 
ROOTPART=$(findmnt -lno source /|sed 's;[[].*;;')
DRIVENAME=$(lsblk -lno pkname "$ROOTPART")
DRIVEPATH=/dev/$DRIVENAME
# Is /boot/efi listed in /etc/fstab?
EFILISTED=$(grep /boot/efi /etc/fstab)
echo 0>"$RETEFI"
echo 0>"$RETLEGACY"
# We only reinstall. A Slint system has had GRUB installed during its installation
# then /boot/grub/x86_64-efi and/or /boot/grub/i386-pcs should exist.
[ "$EFILISTED" ] && [ -d /boot/grub/x86_64-efi ] && grubefi
[ -d /boot/grub/i386-pc ] && grublegacy 
if [ ! "$(cat "$RETEFI")" = 0 ]; then
    echo "!!!WARNING!!! installing GRUB in EFI mode failed!"
    echo "Please find the issue and solve it before rebooting!"
fi
if [ ! "$(cat "$RETLEGACY")" = 0 ] && [ ! -d /sys/firmware/efi ] ; then
    echo "!!!WARNING!!! installing GRUB in Legacy mode failed!"
    echo "Please find the issue and solve it before rebooting!"
fi
[ "$(cat "$RETEFI")" = 0 ] && [ "$(cat "$RETLEGACY")" = 0 ] && /usr/sbin/update-grub
  rm   "$RETEFI" "$RETLEGACY" "$BOOTLOADERID" "$SLINTVERSION"