enabling boot menu when it is not displayed

[P5music]

Hello,
I would like to put Tinycore system along with a Linux Mint 9 system.
Mint does not show boot menu now. So I ask how to enable it to add tinycore entry in grub.cfg or similar.
Thanks

[gerald_clark]

That all depends on the boot manager.
For GRUB:
Set a timeout value and comment out hiddenmenu.
EX:
timeout=10
#hiddenmenu

[P5music]

I do not find "hiddenmenu" in grub.cfg so I think grub is not enabled (?).
Can you take a look at the content of the file below? thx.

Code: [Select]

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
set default="0"
if [ ${prev_saved_entry} ]; then
  set saved_entry=${prev_saved_entry}
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z ${boot_once} ]; then
    saved_entry=${chosen}
    save_env saved_entry
  fi
}

function recordfail {
  set recordfail=1
  if [ -n ${have_grubenv} ]; then if [ -z ${boot_once} ]; then save_env recordfail; fi; fi
}
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a9c54082-bd17-42b9-84d4-eadaba81475e
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=640x480
  insmod gfxterm
  insmod vbe
  if terminal_output gfxterm ; then true ; else
    # For backward compatibility with versions of terminal.mod that don't
    # understand terminal_output
    terminal gfxterm
  fi
fi
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a9c54082-bd17-42b9-84d4-eadaba81475e
set locale_dir=($root)/boot/grub/locale
set lang=it
insmod gettext
if [ ${recordfail} = 1 ]; then
  set timeout=-1
else
  set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/07_mintkde_theme ###
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a9c54082-bd17-42b9-84d4-eadaba81475e
insmod jpeg
if background_image /boot/grub/isadorablue.jpeg ; then
  set color_normal=white/black
  set color_highlight=white/light-gray
else
  set menu_color_normal=white/black
  set menu_color_highlight=white/light-gray
fi
### END /etc/grub.d/07_mintkde_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry "Linux Mint 9, 2.6.32-21-generic (/dev/sda1)" --class linuxmint --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a9c54082-bd17-42b9-84d4-eadaba81475e
linux /boot/vmlinuz-2.6.32-21-generic root=UUID=a9c54082-bd17-42b9-84d4-eadaba81475e ro   quiet splash
initrd /boot/initrd.img-2.6.32-21-generic
}
menuentry "Linux Mint 9, 2.6.32-21-generic (/dev/sda1) -- recovery mode" --class linuxmint --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a9c54082-bd17-42b9-84d4-eadaba81475e
echo 'Caricamento Linux 2.6.32-21-generic...'
linux /boot/vmlinuz-2.6.32-21-generic root=UUID=a9c54082-bd17-42b9-84d4-eadaba81475e ro single
echo 'Caricamento ramdisk iniziale...'
initrd /boot/initrd.img-2.6.32-21-generic
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/10_lupin ###
### END /etc/grub.d/10_lupin ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a9c54082-bd17-42b9-84d4-eadaba81475e
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a9c54082-bd17-42b9-84d4-eadaba81475e
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
if [ ${timeout} != -1 ]; then
  if keystatus; then
    if keystatus --shift; then
      set timeout=-1
    else
      set timeout=0
    fi
  else
    if sleep --interruptible 3 ; then
      set timeout=0
    fi
  fi
fi
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###


[SamK]

Can you take a look at the content of the file below?

This looks like a GRUB2 format - if so do heed the warning given at the head of the file.  If Mint is anything like Lubuntu, installing any updates often regenerates grub.cfg which will remove any entries you create in it.

To create a dual boot PC add your Tinycore entries to /etc/grub.d/40_custom and they will be preserved when grub.cfg is recreated.

I have no direct experience of hiding or un-hiding the menu but you may find useful settings in /etc/default/grub.
   

[P5music]

Excuse me, could you read the etc/default/grub content below?
How do I have to edit? I prefer not to experiment too much with this, so I need your help.
thx

Code: [Select]

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.

GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

# 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_LINUX_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"


[SamK]

How do I have to edit? I prefer not to experiment too much with this...

You may find this page helpful:
https://help.ubuntu.com/community/Grub2
See the Section Configuring Grub 2; Sub-Section GRUB_HIDDEN_TIMEOUT=0

Again I will repeat that I have not conducted the experiments you propose.