That's a little unfortunate because it appears as a valid config in the grub manual. However, in the manual it uses "true" instead of "y". That may or may not make a difference. I can't vouch for what Mint may have provided though.I tried GRUB_DISABLE_SUBMENU=y, earlier in my day, with no effect
You may have missed my last post, but I noticed in the grub manual it uses "true" rather than "y", however in my debian "y" is sufficient.I did try the GRUB_DISABLE_SUBMENU=y ...again....just now.....just in case I was holding my tongue wrong...
Same result....no change to grub menu
Same lack of blurb after running sudo update-grub
It looks like you'll also need to change GRUB_DEFAULT= ..., to "fallback" or "default" according to the manual.# If you change this file, run 'update-grub' afterwards to update
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off"
No change....dammit !
In my debian case "0" was sufficient.Changing this option (GRUB_DISABLE_SUBMENU) will require changing existing values of ‘GRUB_DEFAULT’... ‘fallback’ (see Section 15.1.11 [fallback], page 59) and 'default’ (see Section 15.1.10 [default], page 59)