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Thread: How to change Ubuntu rootdelay

  1. #1
    Join Date
    Jul 2010
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    2

    Exclamation How to change Ubuntu rootdelay

    I recently installed ubuntu 10.04

    when i boot up i get "gave up waiting for root device" then i get dropped to a shell.

    my hardware is taking too long... cause if i wait a few minutes then type exit it boots normally.

    so i must have to increase my rootdelay.

    please try to explain step by step in detail cause im totally new to ubuntu.

    i read around i people just say "edit /boot/grub/menu.lst" but i dont really know what that means...

  2. #2
    Join Date
    Feb 2005
    Location
    Melbourne, Australia
    Beans
    13,505
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: How to change Ubuntu rootdelay

    Quote Originally Posted by JoelAllen View Post
    ........
    i read around i people just say "edit /boot/grub/menu.lst" but i dont really know what that means...
    That is an ancient file that does not apply to the version you are using - totally ignore any information related to it.

    You need to edit the /etc/default/grub file and then do other steps to make these sort of changes.

    Do a web search for Grub2 HOWTO and see if you can find something you can understand.
    Regards, David.
    Please use the Forum search and Wiki search for immediate help
    Please mark your thread as Solved when appropriate
    New to technical forums?: How To Ask Questions The Smart Way

  3. #3
    Join Date
    Jul 2010
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    2

    Re: How to change Ubuntu rootdelay

    i did in terminal:

    Code:
    sudo gedit /etc/default/grub
    and here is what is in the file: (i didnt put the stuff in comments)

    Code:
    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=" "
    then i read that you do in terminal:

    Code:
    sudo update-grub
    so what do i have to change or add to make my rootdelay much longer?

  4. #4
    Join Date
    Sep 2010
    Beans
    1

    Re: How to change Ubuntu rootdelay

    Here is the fix for root delay...

    After the Busy Box error message comes up, wait 15 seconds, then type "exit" (without the quotes.) and hit enter.

    You should boot into your Ubuntu OS. If not, keep typing exit and hit enter until it does.

    To avoid this procedure in the future, open your Terminal (in Accessories) and enter this command:

    sudo gedit /etc/default/grub (spaces between sudo gedit / are required)

    In the pop up window, edit as follows:

    GRUB_TIMEOUT=0

    Under GRUB_CMDLINE_LINUX=" " add this line:

    GRUB_DISABLE_LINUX_UUID=true

    Click save and go back to command terminal. Enter:

    sudo update-grub (enter)

    Then reboot your computer. You should no longer have the hang up or the need to enter commands,

    There you go. This resolved my own root delay issue on Ubuntu 10.04.

  5. #5
    Join Date
    May 2009
    Location
    Earth, Europe, NL
    Beans
    1
    Distro
    Ubuntu 9.04 Jaunty Jackalope

    Re: How to change Ubuntu rootdelay

    I ran into the same problem after adding a Sweex SATA PCI controller on Ubuntu 10.04.

    In my case I added a file 09_linux_rootdelay as root to /etc/grub.d/ with the following contents.

    Code:
    #! /bin/sh -e
    
    # grub-mkconfig helper script.
    # Copyright (C) 2006,2007,2008,2009,2010  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=${prefix}
    bindir=${exec_prefix}/bin
    libdir=${exec_prefix}/lib
    . ${libdir}/grub/grub-mkconfig_lib
    
    export TEXTDOMAIN=grub
    export TEXTDOMAINDIR=@LOCALEDIR@
    
    CLASS="--class gnu-linux --class gnu --class os"
    
    if [ "x${GRUB_DISTRIBUTOR}" = "x" ] ; then
      OS=GNU/Linux
    else
      OS="${GRUB_DISTRIBUTOR}"
      CLASS="--class $(echo ${GRUB_DISTRIBUTOR} | tr '[A-Z]' '[a-z]' | cut -d' ' -f1) ${CLASS}"
    fi
    
    # loop-AES arranges things so that /dev/loop/X can be our root device, but
    # the initrds that Linux uses don't like that.
    case ${GRUB_DEVICE} in
      /dev/loop/*|/dev/loop[0-9])
        GRUB_DEVICE=`losetup ${GRUB_DEVICE} | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/"`
        # We can't cope with devices loop-mounted from files here.
        case ${GRUB_DEVICE} in
          /dev/*) ;;
          *) exit 0 ;;
        esac
      ;;
    esac
    
    if [ "x${GRUB_DEVICE_UUID}" = "x" ] || [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ] \
        || ! test -e "/dev/disk/by-uuid/${GRUB_DEVICE_UUID}" \
        || [ "`grub-probe -t abstraction --device ${GRUB_DEVICE} | sed -e 's,.*\(lvm\).*,\1,'`" = "lvm"  ] ; then
      LINUX_ROOT_DEVICE=${GRUB_DEVICE}
    else
      LINUX_ROOT_DEVICE=UUID=${GRUB_DEVICE_UUID}
    fi
    
    # add crashkernel option if we have the required tools
    if [ -x "/usr/bin/makedumpfile" ] && [ -x "/sbin/kexec" ]; then
        GRUB_CMDLINE_EXTRA="$GRUB_CMDLINE_EXTRA crashkernel=384M-2G:64M,2G-:128M"
    fi
    
    linux_entry ()
    {
      os="$1"
      version="$2"
      recovery="$3"
      args="$4"
      if ${recovery} ; then
        title="$(gettext_quoted "%s, with Linux %s (recovery mode), rootdelay=90")"
      else
        title="$(gettext_quoted "%s, with Linux %s, rootdelay=90")"
      fi
      printf "menuentry '${title}' ${CLASS} {\n" "${os}" "${version}"
      cat << EOF
        recordfail
    EOF
      save_default_entry | sed -e "s/^/\t/"
    
      if [ "x$GRUB_GFXPAYLOAD_LINUX" != x ]; then
          cat << EOF
        set gfxpayload=$GRUB_GFXPAYLOAD_LINUX
    EOF
      fi
    
      if [ -z "${prepare_boot_cache}" ]; then
        prepare_boot_cache="$(prepare_grub_to_access_device ${GRUB_DEVICE_BOOT} | sed -e "s/^/\t/")"
      fi
      printf '%s\n' "${prepare_boot_cache}"
      if [ "x$5" != "xquiet" ]; then
        cat << EOF
        echo    '$(printf "$(gettext_quoted "Loading Linux %s ...")" ${version})'
    EOF
      fi
      cat << EOF
        linux    ${rel_dirname}/${basename} rootdelay=90 root=${linux_root_device_thisversion} ro ${args}
    EOF
      if [ "x$5" != "xquiet" ]; then
        cat << EOF
        echo    '$(gettext_quoted "Loading initial ramdisk ...")'
    EOF
      fi
      if test -n "${initrd}" ; then
        cat << EOF
        initrd    ${rel_dirname}/${initrd}
    EOF
      fi
      cat << EOF
    }
    EOF
    }
    
    list=`for i in /boot/vmlinu[xz]-* /vmlinu[xz]-* ; do
            if grub_file_is_not_garbage "$i" ; then echo -n "$i " ; fi
          done`
    prepare_boot_cache=
    
    while [ "x$list" != "x" ] ; do
      linux=`version_find_latest $list`
      echo "Found linux image: $linux" >&2
      basename=`basename $linux`
      dirname=`dirname $linux`
      rel_dirname=`make_system_path_relative_to_its_root $dirname`
      version=`echo $basename | sed -e "s,^[^0-9]*-,,g"`
      alt_version=`echo $version | sed -e "s,\.old$,,g"`
      linux_root_device_thisversion="${LINUX_ROOT_DEVICE}"
    
      initrd=
      for i in "initrd.img-${version}" "initrd-${version}.img" \
           "initrd-${version}" "initrd.img-${alt_version}" \
           "initrd-${alt_version}.img" "initrd-${alt_version}"; do
        if test -e "${dirname}/${i}" ; then
          initrd="$i"
          break
        fi
      done
      if test -n "${initrd}" ; then
        echo "Found initrd image: ${dirname}/${initrd}" >&2
      else
        # "UUID=" magic is parsed by initrds.  Since there's no initrd, it can't work here.
        linux_root_device_thisversion=${GRUB_DEVICE}
      fi
    
      linux_entry "${OS}" "${version}" false \
          "${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_EXTRA} ${GRUB_CMDLINE_LINUX_DEFAULT}" \
          quiet
      if [ "x${GRUB_DISABLE_LINUX_RECOVERY}" != "xtrue" ]; then
        linux_entry "${OS}" "${version}" true \
        "single ${GRUB_CMDLINE_LINUX}"
      fi
    
      list=`echo $list | tr ' ' '\n' | grep -vx $linux | tr '\n' ' '`
    done
    This is a copy of 10_linux, with minor changes to set the rootdelay:

    Code:
    linux    ${rel_dirname}/${basename} rootdelay=90 root=${linux_root_device_thisversion} ro ${args}
    Naming the file 09_linux_rootdelay allows the file to add entries before the entires created by 10_linux and so will be used as default. Also after kernel updates, these entries should still work and UUIDs are preserved.

    Be sure to run sudo chmod +x on the file and run sudo update-grup afterwards.

  6. #6
    Join Date
    Mar 2012
    Beans
    1

    Re: How to change Ubuntu rootdelay

    Quote Originally Posted by denegen View Post
    I ran into the same problem after adding a Sweex SATA PCI controller on Ubuntu 10.04.

    In my case I added a file 09_linux_rootdelay as root to /etc/grub.d/ with the following contents.

    <snip>

    Be sure to run sudo chmod +x on the file and run sudo update-grup afterwards.
    Thanks denegen - exactly what I needed to know =D>(and couldn't find elsewhere). (The last command should be
    sudo update-grub
    of course.

  7. #7
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    Ubuntu Development Release

  8. #8
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
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    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: How to change Ubuntu rootdelay

    I do not know what problem is.
    Some other threads with possible info:

    See post #4 busybox exit & boot - blue screen;s post
    http://ubuntuforums.org/showthread.p...ight=rootdelay
    busybox See quixote post
    http://ubuntuforums.org/showthread.p...ight=rootdelay
    Oldfred on vacation. Back Sept 9. Will not have much if any Internet access.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







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