Ubuntu: Hide GRUB2 menu UNLESS you hold down Shift key: how to make this happen?



Question:

I have a Ubuntu - Windows 7 dual-boot set-up, and I would like to have it that my laptop would boot up Windows 7 unless I press down the Shift key right after boot and bring up the Grub2 menu from which I can choose Ubuntu.

I researched on Grub2 and options for etc/default/grub and I have tried playing around with combinations with the GRUB_TIMEOUT and GRUB_HIDDEN_TIMEOUT values, but to no avail. I tried setting the GRUB_HIDDEN_TIMEOUT higher than the GRUB_TIMEOUT thinking that both countdown start simultaneously, but no - GRUB_TIMEOUT only starts after the other is done.

Is this behavior achievable?

If so, how?


Solution:1

I think that I found a simpler resolution. Modify the following lines in the file /etc/default/grub :

GRUB_HIDDEN_TIMEOUT=0.0

GRUB_TIMEOUT=0.0

Of course we finally run an update-grub. It works on my PC.


Solution:2

In Kubuntu 14.04, this does not work, if you set GRUB_TIMEOUT= 0, strangely, after applying this and rebooting, the grub menu remains visible for 10s.

The reason for this is that in another grub script there is a piece of code that sets grub_timeout to 10 if it has the value of 0.

So this is how i got it to work:

make a copy of both grub and 30_osprober files !!! When something goes wrong, you can put the original files back

In /etc/default/grub

GRUB_DEFAULT=4    #set this value to the OS you want to boot  GRUB_HIDDEN_TIMEOUT=0    GRUB_TIMEOUT=0  

in /etc/grub.d/30_os-prober, there is a piece of code that sets grub timeout to 10s if it is set to zero in /etc/default/grub, I don't know why the devs put it there, but it prevents hiding the grub menu.

set timeout_style=menu    if [ "\${timeout}" = 0 ]; then        set timeout=10  # I changed this from 10 to 0  

After these changes, run sudo update-grub to generate the new grub boot sequence.

I document all my linux fixes/mods on https://sites.google.com/site/marcshomesite/Home/linux-tuning


Solution:3

This is for Ubuntu 16.04.

I solved this with a little combination of some of the answers found above, so it is not necessary to modify 30_os-prober, avoiding future merges when the grub package is updated...

Hope it helps.

Changed some variables in /etc/default/grub to reflect what I want;

GRUB_DEFAULT=4  GRUB_HIDDEN_TIMEOUT=5  GRUB_HIDDEN_TIMEOUT_QUIET=true  GRUB_TIMEOUT=0  GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"  GRUB_CMDLINE_LINUX=""    GRUB_FORCE_HIDDEN_MENU="true"  export GRUB_FORCE_HIDDEN_MENU  

Then created a new file;

sudo touch /etc/grub.d/50_hidemenu  sudo chmod +x /etc/grub.d/50_hidemenu  

filled it with this content;

#!/bin/sh  cat <<EOF  if [ "x\${timeout}" != "x-1" ]; then    if keystatus; then      if keystatus --shift; then        set timeout=-1      else        set timeout=0      fi    else      if sleep --interruptible ${GRUB_HIDDEN_TIMEOUT} ; then        set timeout=0      fi    fi  fi  EOF  

and updated grub;

sudo update-grub  

Cheers.


Solution:4

To automatically boot Windows without having to select from the GRUB menu we need to edit the /etc/default/grub file with values similar to these:

GRUB_DEFAULT= <number of default entry starting from 0>  GRUB_TIMEOUT= 0 # time in seconds to boot default  # GRUB_HIDDEN_TIMEOUT=0 # warning: activating this may lock you out from GRUB menu  

It is always a good idea to make backups of these files before you edit them. After having made changes we need to activate them with

sudo update-grub  

Values for GRUB_DEFAULT depend on our individual system. To always boot Windows we can alternatively put in the name of the entry exactly as it was shown in the Grub menu (e.g. "Microsoft Windows XP Professional") instead of the entry number.


Important note: in some machines GRUB menu can not be displayed with pressing and holding left Shift on boot (see bug #425979). Therefore it may be a good idea to first test this with booting Ubuntu (not Windows) set as default OS. Then you will be able to easily undo your GRUB settings in case you are affected.


Solution:5

I was trying to do the same and I found great help in the Ubuntu Forums, particularly in this thread.

Assuming you did the right thing with /etc/default/grub, correctly setting GRUB_TIMEOUT and GRUB_HIDDEN_TIMEOUT (I'd say respectively to 0 and 5) and even GRUB_DEFAULT to specify the default image to boot, here's the procedure to have it work the right way.

  1. Add those lines

    GRUB_FORCE_HIDDEN_MENU="true"  export GRUB_FORCE_HIDDEN_MENU  

    to the end of /etc/default/grub

  2. Backup your /etc/grub.d/30_os-prober and overwrite it with the version found here

  3. Test it! To show the menu press the SHIFT key

This problem is related to the multi OS setup and editing the script is one of the way to correct that.

30_os-prober:

#! /bin/sh  set -e    # grub-mkconfig helper script.  # Copyright (C) 2006,2007,2008,2009  Free Software Foundation, Inc.  #  # GRUB is free software: you can redistribute it and/or modify  # it under the terms of the GNU General Public License as published by  # the Free Software Foundation, either version 3 of the License, or  # (at your option) any later version.  #  # GRUB is distributed in the hope that it will be useful,  # but WITHOUT ANY WARRANTY; without even the implied warranty of  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  # GNU General Public License for more details.  #  # You should have received a copy of the GNU General Public License  # along with GRUB.  If not, see <http://www.gnu.org/licenses/>.    prefix="/usr"  exec_prefix="${prefix}"  datarootdir="${prefix}/share"    . "${datarootdir}/grub/grub-mkconfig_lib"    found_other_os=    make_timeout () {      if [ "x${found_other_os}" = "x" ] || [ "x${GRUB_FORCE_HIDDEN_MENU}" = "xtrue" ] ; then       if [ "x${1}" != "x" ] ; then        if [ "x${GRUB_HIDDEN_TIMEOUT_QUIET}" = "xtrue" ] ; then      verbose=        else      verbose=" --verbose"        fi          if [ "x${1}" = "x0" ] ; then      cat <<EOF  if [ "x\${timeout}" != "x-1" ]; then    if keystatus; then      if keystatus --shift; then        set timeout=-1      else        set timeout=0      fi    else      if sleep$verbose --interruptible 3 ; then        set timeout=0      fi    fi  fi  EOF        else      cat << EOF  if [ "x\${timeout}" != "x-1" ]; then    if sleep$verbose --interruptible ${GRUB_HIDDEN_TIMEOUT} ; then      set timeout=0    fi  fi  EOF        fi      fi    fi  }    adjust_timeout () {    if [ "x$GRUB_BUTTON_CMOS_ADDRESS" != "x" ]; then      cat <<EOF  if cmostest $GRUB_BUTTON_CMOS_ADDRESS ; then  EOF      make_timeout "${GRUB_HIDDEN_TIMEOUT_BUTTON}" "${GRUB_TIMEOUT_BUTTON}"      echo else      make_timeout "${GRUB_HIDDEN_TIMEOUT}" "${GRUB_TIMEOUT}"      echo fi    else      make_timeout "${GRUB_HIDDEN_TIMEOUT}" "${GRUB_TIMEOUT}"    fi  }    if [ "x${GRUB_DISABLE_OS_PROBER}" = "xtrue" ]; then    adjust_timeout    exit 0  fi    if [ -z "`which os-prober 2> /dev/null`" -o -z "`which linux-boot-prober 2> /dev/null`" ] ; then    # missing os-prober and/or linux-boot-prober    adjust_timeout    exit 0  fi    OSPROBED="`os-prober | tr ' ' '^' | paste -s -d ' '`"  if [ -z "${OSPROBED}" ] ; then    # empty os-prober output, nothing doing    adjust_timeout    exit 0  fi    osx_entry() {      found_other_os=1          cat << EOF  menuentry "${LONGNAME} (${2}-bit) (on ${DEVICE})" --class osx --class darwin --class os {  EOF      save_default_entry | sed -e "s/^/\t/"      prepare_grub_to_access_device ${DEVICE} | sed -e "s/^/\t/"      cat << EOF          load_video          set do_resume=0          if [ /var/vm/sleepimage -nt10 / ]; then             if xnu_resume /var/vm/sleepimage; then               set do_resume=1             fi          fi          if [ \$do_resume = 0 ]; then             xnu_uuid ${OSXUUID} uuid             if [ -f /Extra/DSDT.aml ]; then                acpi -e /Extra/DSDT.aml             fi             $1 /mach_kernel boot-uuid=\${uuid} rd=*uuid             if [ /System/Library/Extensions.mkext -nt /System/Library/Extensions ]; then                xnu_mkext /System/Library/Extensions.mkext             else                xnu_kextdir /System/Library/Extensions             fi             if [ -f /Extra/Extensions.mkext ]; then                xnu_mkext /Extra/Extensions.mkext             fi             if [ -d /Extra/Extensions ]; then                xnu_kextdir /Extra/Extensions             fi             if [ -f /Extra/devprop.bin ]; then                xnu_devprop_load /Extra/devprop.bin             fi             if [ -f /Extra/splash.jpg ]; then                insmod jpeg                xnu_splash /Extra/splash.jpg             fi             if [ -f /Extra/splash.png ]; then                insmod png                xnu_splash /Extra/splash.png             fi             if [ -f /Extra/splash.tga ]; then                insmod tga                xnu_splash /Extra/splash.tga             fi          fi  }  EOF  }    wubi=    for OS in ${OSPROBED} ; do    DEVICE="`echo ${OS} | cut -d ':' -f 1`"    LONGNAME="`echo ${OS} | cut -d ':' -f 2 | tr '^' ' '`"    LABEL="`echo ${OS} | cut -d ':' -f 3 | tr '^' ' '`"    BOOT="`echo ${OS} | cut -d ':' -f 4`"      if [ -z "${LONGNAME}" ] ; then      LONGNAME="${LABEL}"    fi      echo "Found ${LONGNAME} on ${DEVICE}" >&2      case ${BOOT} in      chain)          case ${LONGNAME} in      Windows*)        if [ -z "$wubi" ]; then          if [ -x /usr/share/lupin-support/grub-mkimage ] && \             /usr/share/lupin-support/grub-mkimage --test; then            wubi=yes          else            wubi=no          fi        fi        if [ "$wubi" = yes ]; then          echo "Skipping ${LONGNAME} on Wubi system" >&2          continue        fi        ;;        esac          found_other_os=1        cat << EOF  menuentry "${LONGNAME} (on ${DEVICE})" --class windows --class os {  EOF        save_default_entry | sed -e "s/^/\t/"        prepare_grub_to_access_device ${DEVICE} | sed -e "s/^/\t/"          case ${LONGNAME} in      Windows\ Vista*|Windows\ 7*|Windows\ Server\ 2008*)      ;;      *)        cat << EOF      drivemap -s (hd0) \${root}  EOF      ;;        esac          cat <<EOF      chainloader +1  }  EOF      ;;      linux)        LINUXPROBED="`linux-boot-prober ${DEVICE} 2> /dev/null | tr ' ' '^' | paste -s -d ' '`"        prepare_boot_cache=          for LINUX in ${LINUXPROBED} ; do          LROOT="`echo ${LINUX} | cut -d ':' -f 1`"          LBOOT="`echo ${LINUX} | cut -d ':' -f 2`"          LLABEL="`echo ${LINUX} | cut -d ':' -f 3 | tr '^' ' '`"          LKERNEL="`echo ${LINUX} | cut -d ':' -f 4`"          LINITRD="`echo ${LINUX} | cut -d ':' -f 5`"          LPARAMS="`echo ${LINUX} | cut -d ':' -f 6- | tr '^' ' '`"            if [ -z "${LLABEL}" ] ; then            LLABEL="${LONGNAME}"          fi        if [ "${LROOT}" != "${LBOOT}" ]; then        LKERNEL="${LKERNEL#/boot}"        LINITRD="${LINITRD#/boot}"      fi        if [ -z "${prepare_boot_cache}" ]; then        prepare_boot_cache="$(prepare_grub_to_access_device ${LBOOT} | sed -e "s/^/\t/")"        [ "${prepare_boot_cache}" ] || continue      fi      found_other_os=1          cat << EOF  menuentry "${LLABEL} (on ${DEVICE})" --class gnu-linux --class gnu --class os {  EOF      save_default_entry | sed -e "s/^/\t/"      printf '%s\n' "${prepare_boot_cache}"      cat <<  EOF      linux ${LKERNEL} ${LPARAMS}  EOF          if [ -n "${LINITRD}" ] ; then            cat << EOF      initrd ${LINITRD}  EOF          fi          cat << EOF  }  EOF        done      ;;      macosx)        OSXUUID="`grub-probe --target=fs_uuid --device ${DEVICE} 2> /dev/null`"        osx_entry xnu_kernel 32        osx_entry xnu_kernel64 64      ;;      hurd)        found_other_os=1        cat << EOF  menuentry "${LONGNAME} (on ${DEVICE})" --class hurd --class gnu --class os {  EOF        save_default_entry | sed -e "s/^/\t/"        prepare_grub_to_access_device ${DEVICE} | sed -e "s/^/\t/"        grub_device="`${grub_probe} --device ${DEVICE} --target=drive`"        mach_device="`echo "${grub_device}" | sed -e 's/(\(hd.*\),msdos\(.*\))/\1s\2/'`"        grub_fs="`${grub_probe} --device ${DEVICE} --target=fs`"        case "${grub_fs}" in      *fs)    hurd_fs="${grub_fs}" ;;      *)  hurd_fs="${grub_fs}fs" ;;        esac        cat << EOF      multiboot /boot/gnumach.gz root=device:${mach_device}      module /hurd/${hurd_fs}.static ${hurd_fs} --readonly \\              --multiboot-command-line='\${kernel-command-line}' \\              --host-priv-port='\${host-port}' \\              --device-master-port='\${device-port}' \\              --exec-server-task='\${exec-task}' -T typed '\${root}' \\              '\$(task-create)' '\$(task-resume)'      module /lib/ld.so.1 exec /hurd/exec '\$(exec-task=task-create)'  }  EOF      ;;      *)        echo "  ${LONGNAME} is not yet supported by grub-mkconfig." >&2      ;;    esac  done    adjust_timeout          cat <<EOF  if [ "x\${timeout}" != "x-1" ]; then    if keystatus; then      if keystatus --shift; then        set timeout=-1      else        set timeout=0      fi    else      if sleep$verbose --interruptible 3 ; then        set timeout=0      fi    fi  fi  EOF  


Solution:6

install grub optimizer

sudo add-apt-repository ppa:danielrichter2007/grub-customizer

sudo apt-get update  sudo apt-get install grub-customizer  

Grub Customizer will now show up in the Applications > System Tools menu.

Or you can open it from the command line.

gksudo grub-customizer

image inside for grub options

enter image description here


Solution:7

On Ubuntu 16.04 I've done the following changes. Of course you need to be a privileged user to do so.

  1. First change is in the /etc/grub.d/30_os-prober file:

    • Open it with sudo gedit /etc/grub.d/30_os-prober
    • Change quick_boot="1" to quick_boot="0"
    • save the file
  2. Thereafter you can set the timeout values in /etc/default/grub to zero or some other value:

    • Open it with sudo gedit /etc/default/grub
    • GRUB_HIDDEN_TIMEOUT=0 and GRUB_TIMEOUT=0.
    • save the file
  3. The last step is to update grub

    • sudo update-grub

The changes to the first file are because the default setting is that if other OS (e. g. Windows 10) are found the timeout value is always set to 10 seconds and therefore cannot be changed by /etc/default/grub. This is accomplished by a function named adjust_timeout which asks if quick_boot is set and if other OS are present.


Solution:8

MAKING THE GRUB2 BOOT MENU AUTOMATICALLY VISIBLE

For some reason, editing the GRUB_GFXMODE=640x480 settings in the Grub Customizer usually makes the boot menu visible:

  1. Install grub-customizer as above and update
  2. find Grub Customizer in the GUI (for me it's in System>Administration>..., but for some it is fund under Applications>System Tools>..)
  3. Open Grub Customizer and select Preferences> Advanced
  4. Select GRUB_gfxmode (640X480) - if it is already selected, deselect it, reboot, and select it again.
  5. cross your fingers and reboot!

I have no idea why this worked for me, but it worked on both of my computers, so hopefully it will work for you too!


Solution:9

Shasteriskt, one alternative to the 'SHIFT' solution is just to create a script that does some move operations for you. What I mean is create a file called grub.bak that is an exact copy of your grub.cfg file, with the only difference being that the set timeout=0 line is changed to set timeout=10 for example. Create a shell script that does a switch allowing you to reboot according to your needs. I created an equivalent python script that fulfills these requirements, but of course it has to be called with sudo. I simply put it into /usr/bin on my setup as a symlink to the actual script itself. Note: I am running fluxbox on Arch so I'm not sure if there are any discrepancies between this script and Ubuntu, but there should be little to no modifications, I think. Script looks like:

#! /usr/bin/python  from shlex import split  from subprocess import call  from os import rename, chdir    chdir('/boot/grub/')  try:      with open('grub.bak','r') as alternate:          pass      if raw_input('Auto-boot is set. Un-set?> ') == 'y':          rename('grub.cfg','grub.back')          rename('grub.bak','grub.cfg')        if raw_input('Reboot system?> ') == 'y':          call(split('shutdown -r now'))    except:      if raw_input('Auto-boot is not set. Set?> ') == 'y':          rename('grub.cfg','grub.bak')          rename('grub.back','grub.cfg')        if raw_input('Reboot system?> ') == 'y':          call(split('shutdown -r now'))  

The script basically just determines whether or not you have the menu to load or not (auto-boot or not). Based on its findings, it asks you if you would like to turn it on or off, and then asks if you if you want to reboot. Conversely, if you want it to work the other way around (i.e. in Windows), and you have Windows set up to access files in Linux, you can run the same script in that environment as well, if you wish. Hope that helps.


Solution:10

I was having the same problem on a single boot system. If GRUB_TIMEOUT was non-zero the menu would always popped up regardless of GRUB_HIDDEN_TIMEOUT. If GRUB_TIMEOUT was zero it would sleep for GRUB_HIDDEN_TIMEOUT seconds but neither SHIFT nor ESC would show the menu.

I fixed it by adding an else clause to the sleep statment at the end of adjust_time() in 30_os-prober. Now if it isn't interrupted the timeout is zero and it boots with no menu, but if it is interrupted I set the timeout to 10.

This actually seems backwards since sleep should return 0 (false) if it's not interrupted and 1 (true) if it is but it seemed to work for me.


Solution:11

So even if you set GRUB_TIMEOUT to 0, if you have any GRUB_HIDDEN_TIMEOUT, 30_os-prober will set timeout to 10 whether you like it or not. Other solutions here edit that script, but that could cause update issues you'll have to merge if GRUB is updated.

Better solution: write the following in /etc/grub.d/50_goddamnit (new file):

#!/bin/sh  echo "set timeout=0"  

Basically, this will run last and be the final line in /boot/grub/grub.conf, thereby overriding all the other silly mishigus in the default config.


Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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