From the Recovery Mode....Install for x89_64-efi platform
Installed Fine....no errors
below is a copy and paste after reboot/after fix/after update-grub
etc/default/grub....after fix
# 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_DISABLE_OS_PROBER=false
GRUB_DEFAULT=0
GRUB_SAVEDEFAULT=true
GRUB_TIMEOUT_STYLE=menu
# 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=640x480
# 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"
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50_linuxmint.cfg after fix etc
#! /bin/sh
set -e
# Set distributor to "Ubuntu"
#
# In Mint 16:
# shim and grub come with hardcoded ubuntu strings upstream, without this EFI installation is broken
#
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1242417
#
# In Mint 17:
# Despite the bug report being marked as fixed, the situation is the same. Grub was patched by Ubuntu
# to assign the "ubuntu" distributor ID when it was given "Kubuntu". That results in Kubuntu finally
# getting EFI to work out of the box but still using "ubuntu" as far as grub-install is concerned.
# So we'll stick to "Ubuntu" for this iteration.
#
# In Mint 18:
# Some packages are still hardcoded with the "ubuntu" path.. fwupdate for instance.
# Visually, the grub boot menuentry name is set for derivatives in 10_linux,
# but underneath the EFI path remains "ubuntu" for everything to work properly.
GRUB_DISABLE_OS_PROBER=false
GRUB_DEFAULT=0
GRUB_SAVEDEFAULT=true
GRUB_TIMEOUT_STYLE=menu
# Re-enable OS Prober
# Since Mint 21
#
https://lists.gnu.org/archive/html/grub-devel/2021-03/msg00120.html
back in 10....tea time
Tomorrow, I will clean this up a bit.