Linux mint21. Show all available kernels in grub at boot

[wizardfromoz]

Quite so, @osprey , but that will not be the issue, as we have just seen above, it will be to do with the superseded versions showing.

 

[wizardfromoz]

Oops, I should say (and not sound so cocky) I will know more when I have updated Vanessa. Likely on my tomorrow.

 

[Condobloke]

I read somewhere today that in LM21 the 'additional' kernels have been suppressed/hidden.....words to that effect......

In LM20.3, if a new kernel came in via Update Manager, and the pc was then rebooted (as requested to by update manager) the 'new' kernel would be used immediately

Obviously not so with LM21 !

 

[osprey]

I tried GRUB_DISABLE_SUBMENU=y, earlier in my day, with no effect

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.

Reading wizardfromoz though I may be missing something.

 

[Condobloke]

eading kernel 6.0 didntinterestingly when I sudo update-grub ....I get :

[email protected]:~$ sudo update-grub
Sourcing file `/etc/default/grub'
[email protected]:~$

.....no blurb.....

 

[Condobloke]

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

 

[Condobloke]

Note that the 'changes' here are implemented at /etc/default/grub.d/90_custom.cfg: ...??​

​

How to make the Grub menu always visible​

If you only run Linux Mint and there are no other operating systems on the computer, the menu is hidden by default.

To make it visible, as root, add these lines to /etc/default/grub.d/90_custom.cfg:

GRUB_TIMEOUT="5"
GRUB_TIMEOUT_STYLE="menu"

Then type the following commands in a terminal:

sudo update-grub

 

[wizardfromoz]

cat /etc/default/grub.d/90_custom.cfg

?

 

[wizardfromoz]

and where was the quote from, Brian?

 

[Condobloke]

from ::

Grub Boot Menu — Linux Mint User Guide documentation

linuxmint-user-guide.readthedocs.io

 

[osprey]

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

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.

 

[Condobloke]

Yeah.....I know.....I looked too

 

[Condobloke]

@osprey ...I will try ....true.

 

[osprey]

I was wondering if those instructions from mint you mentioned in post #27 work and get what you want.

 

[Condobloke]

# 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=4
GRUB_TIMEOUT_STYLE=menu
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
#GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off"
GRUB_CMDLINE_LINUX=""
GRUB_DISABLE_SUBMENU=true

No change....dammit !

 

[Condobloke]

I copy and paste that :

cat /etc/default/grub.d/90_custom.cfg

into terminal and I get :

[email protected]:~$ cat /etc/default/grub.d/90_custom.cfg
cat: /etc/default/grub.d/90_custom.cfg: No such file or directory
[email protected]:~$

 

[Condobloke]

The gremlins are alive and doing well, tonight

 

[wizardfromoz]

My bad, should have been

cat /etc/grub.d/90_custom.cfg

 

[osprey]

# 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=4
GRUB_TIMEOUT_STYLE=menu
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
#GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off"
GRUB_CMDLINE_LINUX=""
GRUB_DISABLE_SUBMENU=true

No change....dammit !

It looks like you'll also need to change GRUB_DEFAULT= ..., to "fallback" or "default" according to the manual.

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)

In my debian case "0" was sufficient.

 

[Condobloke]

cat /etc/grub.d/90_custom.cfg

I still get
[email protected]:~$ cat /etc/grub.d/90_custom.cfg
cat: /etc/grub.d/90_custom.cfg: No such file or directory
[email protected]:~$