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Thread: Grub prompt shown after update

  1. #1
    Join Date
    Feb 2007
    Beans
    13

    Grub prompt shown after update

    hi all,

    i updated my hadry heron now when i boot grub shows me a a prompt grub> instead of just continueing to boot i hope you can help me out with this

    i tried the following:

    ===========================
    find /boot/grub/stage1

    This will locate your boot partition. If you already know the location, you can ignore this step.

    root (hd0,0)

    Replace the (hd0,0) by your boot partition number. If your Ubuntu is installed in the second partition, then change it to (hd0,1)

    setup (hd0)
    quit

    Reboot your system. You should be able to access the Grub bootloader now.

    =====================

    how ever it doesnt work for me

  2. #2
    Join Date
    Mar 2005
    Location
    UK
    Beans
    562

    Re: Grub prompt shown after update

    What was the output from find /boot/grub/stage1
    in your case.

    (hd0,0) is the first partition on the first hard drive, so I take it you have no dual boot, no windows and no other OS on your hard drive?

    If you run setup (hd0,0) you've told grub to install into the first partition and setup (hd0) to install grub loader code into the mbr.


    If you can boot from the Hardy Heron 8.04 Live CD post the following output
    please:
    fdisk -l

    Also output of
    dmesg | grep sd

    we'll see what happens once we have the extra information.

  3. #3
    Join Date
    Feb 2007
    Beans
    13

    Re: Grub prompt shown after update

    yes your right i had a single boot of ubuntu. no other oses were installed i have two hard drives in the computer. i talked to someone he said it might be something with the menu.lst but before he could help me he had to leave maybe this helps? as i cant seem to fint the menu.lst

    thnx for your quick reply!

    ubuntu@ubuntu:~$ fdisk -l
    ubuntu@ubuntu:~$

    ubuntu@ubuntu:~$ dmesg | grep sd
    [ 74.129195] Driver 'sd' needs updating - please use bus_type methods
    [ 74.129259] sd 0:0:0:0: [sda] 156301488 512-byte hardware sectors (80026 MB)
    [ 74.129270] sd 0:0:0:0: [sda] Write Protect is off
    [ 74.129272] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
    [ 74.129288] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
    [ 74.129333] sd 0:0:0:0: [sda] 156301488 512-byte hardware sectors (80026 MB)
    [ 74.129342] sd 0:0:0:0: [sda] Write Protect is off
    [ 74.129344] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
    [ 74.129359] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
    [ 74.129362] sda:<6>ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 18
    [ 74.199496] sda1 sda2 < sda5 >
    [ 74.225296] sd 0:0:0:0: [sda] Attached SCSI disk
    [ 74.225375] sd 2:0:0:0: [sdb] 156301488 512-byte hardware sectors (80026 MB)
    [ 74.225396] sd 2:0:0:0: [sdb] Write Protect is off
    [ 74.225401] sd 2:0:0:0: [sdb] Mode Sense: 00 3a 00 00
    [ 74.225432] sd 2:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
    [ 74.225502] sd 2:0:0:0: [sdb] 156301488 512-byte hardware sectors (80026 MB)
    [ 74.225531] sd 2:0:0:0: [sdb] Write Protect is off
    [ 74.225533] sd 2:0:0:0: [sdb] Mode Sense: 00 3a 00 00
    [ 74.225548] sd 2:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
    [ 74.225551] sdb:<6>ata5.00: ATAPI: MATSHITADVD-RAM UJ-846S, F100, max UDMA/33
    [ 74.568757] sdb1
    [ 74.568839] sd 2:0:0:0: [sdb] Attached SCSI disk
    [ 74.572837] sd 0:0:0:0: Attached scsi generic sg0 type 0
    [ 74.572857] sd 2:0:0:0: Attached scsi generic sg1 type 0
    [ 152.140946] sdhci: Secure Digital Host Controller Interface driver
    [ 152.140949] sdhci: Copyright(c) Pierre Ossman
    [ 152.310585] sdhci: SDHCI controller found at 0000:06:0b.3 [104c:803c] (rev 0)
    [ 155.286038] Adding 3028212k swap on /dev/sda5. Priority:-1 extents:1 across:3028212k
    ubuntu@ubuntu:~$

  4. #4
    Join Date
    Feb 2007
    Beans
    13

    Re: Grub prompt shown after update

    ubuntu@ubuntu:~$ sudo fdisk -l

    Disk /dev/sda: 80.0 GB, 80026361856 bytes
    255 heads, 63 sectors/track, 9729 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Disk identifier: 0x000d706f

    Device Boot Start End Blocks Id System
    /dev/sda1 * 1 9352 75119908+ 83 Linux
    /dev/sda2 9353 9729 3028252+ 5 Extended
    /dev/sda5 9353 9729 3028221 82 Linux swap / Solaris

    Disk /dev/sdb: 80.0 GB, 80026361856 bytes
    255 heads, 63 sectors/track, 9729 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Disk identifier: 0x00046c01

    Device Boot Start Endubuntu@ubuntu:~$ sudo fdisk -l

    Disk /dev/sda: 80.0 GB, 80026361856 bytes
    255 heads, 63 sectors/track, 9729 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Disk identifier: 0x000d706f

    Device Boot Start End Blocks Id System
    /dev/sda1 * 1 9352 75119908+ 83 Linux
    /dev/sda2 9353 9729 3028252+ 5 Extended
    /dev/sda5 9353 9729 3028221 82 Linux swap / Solaris

    Disk /dev/sdb: 80.0 GB, 80026361856 bytes
    255 heads, 63 sectors/track, 9729 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Disk identifier: 0x00046c01

    Device Boot Start End Blocks Id System
    /dev/sdb1 1 9729 78148161 83 Linux
    Blocks Id System
    /dev/sdb1 1 9729 78148161 83 Linux

    lol sorry this fdisk -l info is more intresting i think

  5. #5
    Join Date
    Feb 2007
    Beans
    13

    Re: Grub prompt shown after update

    this might be of some use too i found the menu.lst is on my disk-1

    ubuntu@ubuntu:~$ sudo find / -name menu.lst
    /media/disk-1/usr/share/doc/grub/examples/menu.lst
    /media/disk-1/boot/grub/menu.lst
    /usr/share/doc/grub/examples/menu.lst
    find: /home/ubuntu/.gvfs: Permission denied
    /rofs/usr/share/doc/grub/examples/menu.lst
    ubuntu@ubuntu:~$

    this is the contents of the menu.lst

    # menu.lst - See: grub(8), info grub, update-grub(8)
    # grub-install(8), grub-floppy(8),
    # grub-md5-crypt, /usr/share/doc/grub
    # and /usr/share/doc/grub-doc/.

    ## default num
    # Set the default entry to the entry number NUM. Numbering starts from 0, and
    # the entry number 0 is the default if the command is not used.
    #
    # You can specify 'saved' instead of a number. In this case, the default entry
    # is the entry saved with the command 'savedefault'.
    # WARNING: If you are using dmraid do not use 'savedefault' or your
    # array will desync and will not let you boot your system.
    default 0

    ## timeout sec
    # Set a timeout, in SEC seconds, before automatically booting the default entry
    # (normally the first entry defined).
    timeout 3

    ## hiddenmenu
    # Hides the menu by default (press ESC to see the menu)
    hiddenmenu

    # Pretty colours
    #color cyan/blue white/blue

    ## password ['--md5'] passwd
    # If used in the first section of a menu file, disable all interactive editing
    # control (menu entry editor and command-line) and entries protected by the
    # command 'lock'
    # e.g. password topsecret
    # password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
    # password topsecret

    #
    # examples
    #
    # title Windows 95/98/NT/2000
    # root (hd0,0)
    # makeactive
    # chainloader +1
    #
    # title Linux
    # root (hd0,1)
    # kernel /vmlinuz root=/dev/hda2 ro
    #

    #
    # Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

    ### BEGIN AUTOMAGIC KERNELS LIST
    ## lines between the AUTOMAGIC KERNELS LIST markers will be modified
    ## by the debian update-grub script except for the default options below

    ## DO NOT UNCOMMENT THEM, Just edit them to your needs

    ## ## Start Default Options ##
    ## default kernel options
    ## default kernel options for automagic boot options
    ## If you want special options for specific kernels use kopt_x_y_z
    ## where x.y.z is kernel version. Minor versions can be omitted.
    ## e.g. kopt=root=/dev/hda1 ro
    ## kopt_2_6_8=root=/dev/hdc1 ro
    ## kopt_2_6_8_2_686=root=/dev/hdc2 ro
    # kopt=root=UUID=056cb1c2-a2be-4ad4-8e49-5d045403b5a6 ro

    ## Setup crashdump menu entries
    ## e.g. crashdump=1
    # crashdump=0

    ## default grub root device
    ## e.g. groot=(hd0,0)
    # groot=(hd0,0)

    ## should update-grub create alternative automagic boot options
    ## e.g. alternative=true
    ## alternative=false
    # alternative=true

    ## should update-grub lock alternative automagic boot options
    ## e.g. lockalternative=true
    ## lockalternative=false
    # lockalternative=false

    ## additional options to use with the default boot option, but not with the
    ## alternatives
    ## e.g. defoptions=vga=791 resume=/dev/hda5
    # defoptions=quiet splash

    ## should update-grub lock old automagic boot options
    ## e.g. lockold=false
    ## lockold=true
    # lockold=false

    ## Xen hypervisor options to use with the default Xen boot option
    # xenhopt=

    ## Xen Linux kernel options to use with the default Xen boot option
    # xenkopt=console=tty0

    ## altoption boot targets option
    ## multiple altoptions lines are allowed
    ## e.g. altoptions=(extra menu suffix) extra boot options
    ## altoptions=(recovery) single
    # altoptions=(recovery mode) single

    ## controls how many kernels should be put into the menu.lst
    ## only counts the first occurence of a kernel, not the
    ## alternative kernel options
    ## e.g. howmany=all
    ## howmany=7
    # howmany=all

    ## should update-grub create memtest86 boot option
    ## e.g. memtest86=true
    ## memtest86=false
    # memtest86=true

    ## should update-grub adjust the value of the default booted system
    ## can be true or false
    # updatedefaultentry=false

    ## should update-grub add savedefault to the default options
    ## can be true or false
    # savedefault=false

    ## ## End Default Options ##

    title Ubuntu 8.04, kernel 2.6.24-17-generic
    root (hd0,0)
    kernel /boot/vmlinuz-2.6.24-17-generic root=UUID=056cb1c2-a2be-4ad4-8e49-5d045403b5a6 ro quiet splash
    initrd /boot/initrd.img-2.6.24-17-generic
    quiet

    title Ubuntu 8.04, kernel 2.6.24-17-generic (recovery mode)
    root (hd0,0)
    kernel /boot/vmlinuz-2.6.24-17-generic root=UUID=056cb1c2-a2be-4ad4-8e49-5d045403b5a6 ro single
    initrd /boot/initrd.img-2.6.24-17-generic

    title Ubuntu 8.04, kernel 2.6.24-16-generic
    root (hd0,0)
    kernel /boot/vmlinuz-2.6.24-16-generic root=UUID=056cb1c2-a2be-4ad4-8e49-5d045403b5a6 ro quiet splash
    initrd /boot/initrd.img-2.6.24-16-generic
    quiet

    title Ubuntu 8.04, kernel 2.6.24-16-generic (recovery mode)
    root (hd0,0)
    kernel /boot/vmlinuz-2.6.24-16-generic root=UUID=056cb1c2-a2be-4ad4-8e49-5d045403b5a6 ro single
    initrd /boot/initrd.img-2.6.24-16-generic

    title Ubuntu 8.04, kernel 2.6.22-14-generic
    root (hd0,0)
    kernel /boot/vmlinuz-2.6.22-14-generic root=UUID=056cb1c2-a2be-4ad4-8e49-5d045403b5a6 ro quiet splash
    initrd /boot/initrd.img-2.6.22-14-generic
    quiet

    title Ubuntu 8.04, kernel 2.6.22-14-generic (recovery mode)
    root (hd0,0)
    kernel /boot/vmlinuz-2.6.22-14-generic root=UUID=056cb1c2-a2be-4ad4-8e49-5d045403b5a6 ro single
    initrd /boot/initrd.img-2.6.22-14-generic

    title Ubuntu 8.04, memtest86+
    root (hd0,0)
    kernel /boot/memtest86+.bin
    quiet

    ### END DEBIAN AUTOMAGIC KERNELS LIST
    Last edited by freefrags; June 1st, 2008 at 11:05 AM. Reason: added contents of menu.lst

  6. #6
    Join Date
    Aug 2007
    Location
    Kottawa, Sri Lanka
    Beans
    7,387
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Grub prompt shown after update

    Post the output of:-
    Code:
    cat /media/disk-1/boot/grub/menu.lst
    Think carefully before executing commands containing "rm", especially "sudo rm -rf ", if you require more information concerning this matter, read this.
    I am an experimenter, give me the most stable OS and I can make it unstable in a few hours.

    C == seriously fast == FTW!

  7. #7
    Join Date
    Feb 2007
    Beans
    13

    Re: Grub prompt shown after update

    i added the contents of the menu.lst to the previous post i guess i was a bit too slow

  8. #8
    Join Date
    Aug 2007
    Location
    Kottawa, Sri Lanka
    Beans
    7,387
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Grub prompt shown after update

    Try recovering GRUB using the SuperGRUB CD found here.
    Think carefully before executing commands containing "rm", especially "sudo rm -rf ", if you require more information concerning this matter, read this.
    I am an experimenter, give me the most stable OS and I can make it unstable in a few hours.

    C == seriously fast == FTW!

  9. #9
    Join Date
    Feb 2007
    Beans
    13

    Re: Grub prompt shown after update

    ok i have downloaded the cd and tried to recover grub however it doesnt work it reboots and shows the grub prompt once again. :S

  10. #10
    Join Date
    Mar 2008
    Beans
    4,715
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: Grub prompt shown after update

    This is from http://users.bigpond.net.au/hermanzo...n_with_a_grub_
    I'm getting a black screen with a grub>_ prompt
    Usually this means GRUB's stage1 and stage1_5 files in the MBR and first track of the hard disk are okay, and stage2 in the Linux partition is alright but there is no menu.lst file or if there is one it has been renamed or moved.
    Super Grub Disk can help you by booting your Linux kernel and initrd.img directly (via symlinks), so you will be bypassing the menu.lst file.

    1. boot your SGD floppy disk, USB disk or CD-ROM
    2. English Super Grub Disk
    3. Gnu/Linux
    4. Boot Gnu/Linux Directly
    Is this what you tried?

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