Thread: Grub2 doesnt show up, Ubuntu boots automatically

i have karmic 64 bit installed on desktop.
grub2 list never displayed, ubuntu starts directly.

changed timeout in grub2.cfg no effect:

#
# not edit file
#
# automatically generated /usr/sbin/grub-mkconfig using templates
# /etc/grub.d , settings /etc/default/grub
#

### begin /etc/grub.d/00_header ###
if [ -s /boot/grub/grubenv ]; then
have_grubenv=true
load_env
fi
set default="0"
if [ ${prev_saved_entry} ]; then
saved_entry=${prev_saved_entry}
save_env saved_entry
prev_saved_entry=
save_env prev_saved_entry
fi
insmod ext2
set root=(hd0,1)
search --no-floppy --fs-uuid --set a73120ef-c8ff-43b8-be4d-2d61abe1a5df
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
insmod gfxterm
insmod vbe
if terminal_output gfxterm ; true ; else
# backward compatibility versions of terminal.mod don't
# understand terminal_output
terminal gfxterm
fi
fi
if [ ${recordfail} = 1 ]; then
set timeout=10
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/white
### end /etc/grub.d/05_debian_theme ###

### begin /etc/grub.d/10_linux ###
menuentry "ubuntu, linux 2.6.31-17-generic" {
recordfail=1
if [ -n ${have_grubenv} ]; save_env recordfail; fi
set quiet=1
insmod ext2
set root=(hd0,1)
search --no-floppy --fs-uuid --set a73120ef-c8ff-43b8-be4d-2d61abe1a5df
linux /boot/vmlinuz-2.6.31-17-generic root=uuid=a73120ef-c8ff-43b8-be4d-2d61abe1a5df ro quiet splash
initrd /boot/initrd.img-2.6.31-17-generic
}
menuentry "ubuntu, linux 2.6.31-17-generic (recovery mode)" {
recordfail=1
if [ -n ${have_grubenv} ]; save_env recordfail; fi
insmod ext2
set root=(hd0,1)
search --no-floppy --fs-uuid --set a73120ef-c8ff-43b8-be4d-2d61abe1a5df
linux /boot/vmlinuz-2.6.31-17-generic root=uuid=a73120ef-c8ff-43b8-be4d-2d61abe1a5df ro single
initrd /boot/initrd.img-2.6.31-17-generic
}
menuentry "ubuntu, linux 2.6.31-14-generic" {
recordfail=1
if [ -n ${have_grubenv} ]; save_env recordfail; fi
set quiet=1
insmod ext2
set root=(hd0,1)
search --no-floppy --fs-uuid --set a73120ef-c8ff-43b8-be4d-2d61abe1a5df
linux /boot/vmlinuz-2.6.31-14-generic root=uuid=a73120ef-c8ff-43b8-be4d-2d61abe1a5df ro quiet splash
initrd /boot/initrd.img-2.6.31-14-generic
}
menuentry "ubuntu, linux 2.6.31-14-generic (recovery mode)" {
recordfail=1
if [ -n ${have_grubenv} ]; save_env recordfail; fi
insmod ext2
set root=(hd0,1)
search --no-floppy --fs-uuid --set a73120ef-c8ff-43b8-be4d-2d61abe1a5df
linux /boot/vmlinuz-2.6.31-14-generic root=uuid=a73120ef-c8ff-43b8-be4d-2d61abe1a5df ro single
initrd /boot/initrd.img-2.6.31-14-generic
}
### end /etc/grub.d/10_linux ###

### begin /etc/grub.d/20_memtest86+ ###
menuentry "memory test (memtest86+)" {
linux16 /boot/memtest86+.bin
}
menuentry "memory test (memtest86+, serial console 115200)" {
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 ###
# file provides easy way add custom menu entries. type the
# menu entries want add after comment. careful not change
# 'exec tail' line above.
### end /etc/grub.d/40_custom ###

but grub2 list displayed on laptop karmic 64 bit , default grub2.cfg.

i googled , there's ubuntu how-to quite near top of search results.

read article , find bit explains grub_hidden_timeout :

http://ubuntuforums.org/showthread.php?t=1195275

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