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Thread: Ubuntu 14.04 UEFI boot partition and GRUB reinstall problem

  1. #1
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    Ubuntu 14.04 UEFI boot partition and GRUB reinstall problem

    Hi,

    I have installed Ubuntu 14.04 just two weeks ago and now after an update I have a huge problem since I'm not able to recover my system. I tried many things also boot-repair disk https://help.ubuntu.com/community/Boot-Repair and I have deleted both the boot partition by myself and the GRUB by boot-repair disk.
    So now I have to reinstalled both. If I run gparted I get the following partitions (attached image).
    The first partition in /dev/sda is the new UEFI boot partition. I have wrongly delete and reformatted it.
    My /etc/fstab is this
    Code:
    # <file system> <mount point>   <type>  <options>       <dump>  <pass>
    # / was on /dev/sda2 during installation
    UUID=5ec28e7e-8b03-4497-924f-3ea2f2cf6713 /               ext4    errors=remount-ro 0       1
    # /boot/efi was on /dev/sda1 during installation
    UUID=CADB-73B5  /boot/efi       vfat    defaults        0       1
    # swap was on /dev/sda3 during installation
    UUID=8977bcd9-1adf-4cce-b8d7-c3fac5793ec0 none            swap    sw              0       0
    UUID=b3559466-a574-4ace-b6e6-c53bc95eb4fc    /home     ext4     nodev,nosuid     0     2
    I verified and change the UUID of the UEFI partition after that I have deleted it.
    Code:
     sudo blkid
    /dev/loop0: TYPE="squashfs"
    /dev/sda1: UUID="CADB-73B5" TYPE="vfat" // comment this is /dev/sda1
    /dev/sda2: UUID="5ec28e7e-8b03-4497-924f-3ea2f2cf6713" TYPE="ext4"
    /dev/sda3: UUID="8977bcd9-1adf-4cce-b8d7-c3fac5793ec0" TYPE="swap"
    /dev/sda4: UUID="b3559466-a574-4ace-b6e6-c53bc95eb4fc" TYPE="ext4"
    /dev/sdb1: LABEL="UUI" UUID="13ED-3E27" TYPE="vfat"  // comment this is USB devices
    I tried with this
    Code:
    sudo efibootmgr -c -L Ubuntu -d /dev/sda1 
    
    
    ******************************************************
    Warning! This MBR disk does not have a unique signature.
    If this is not the first disk found by EFI, you may not be able
    to boot from it without a unique signature.
    Run efibootmgr with the -w flag to write a unique signature
    to the disk.
    ******************************************************
    
    BootCurrent: 0001
    Timeout: 0 seconds
    BootOrder: 0000,0001
    Boot0001* UEFI: USB 2.0 Flash Disk 5.00
    Boot0000* Ubuntu
    ubuntu@ubuntu:~$ sudo efibootmgr -w
    BootCurrent: 0001
    Timeout: 0 seconds
    BootOrder: 0000,0001
    Boot0000* Ubuntu
    Boot0001* UEFI: USB 2.0 Flash Disk 5.00
    Now I think that I have the right UEFI boot partition in /dev/sda1 linked to /boot/efi. If I'm correct what I can do to reinstall the GRUB?

    Thank you
    Attached Images Attached Images
    Last edited by erotavlas; May 16th, 2014 at 08:17 AM.

  2. #2
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    Re: Ubuntu 14.04 UEFI boot partition and GRUB reinstall problem

    I made some progresses.
    Code:
    sudo gdisk -l /dev/sda
    GPT fdisk (gdisk) version 0.8.8
    
    Partition table scan:
      MBR: protective
      BSD: not present
      APM: not present
      GPT: present
    
    Found valid GPT with protective MBR; using GPT.
    Disk /dev/sda: 1953525168 sectors, 931.5 GiB
    Logical sector size: 512 bytes
    Disk identifier (GUID): 2387EF34-CE79-4736-980C-9E7EB43305A5
    Partition table holds up to 128 entries
    First usable sector is 34, last usable sector is 1953525134
    Partitions will be aligned on 2048-sector boundaries
    Total free space is 3437 sectors (1.7 MiB)
    
    Number  Start (sector)    End (sector)  Size       Code  Name
       1            2048          585727   285.0 MiB   EF00  
       2          585728       195928063   93.1 GiB    8300  
       3       195928064       211552255   7.5 GiB     8200  
       4       211552256      1953523711   830.6 GiB   0700
    I mounted the system partition with Ubuntu inside the path /mnt/system. sda2 (Ubuntu system)
    Code:
    sudo mount /dev/sda2 /mnt/system
    and the I repeated the same for the EFI boot partition in the path /mnt/system/boot/efi that is /boot/efi of Ubuntu system in sda2. sda1 (EFI folder)

    Code:
    sudo mount /dev/sda2 /mnt/system/boot/efi
    I successfully installed one entry into the UEFI BIOS boot list with the following command and now I can choose the boot option inside the boot menu.
    Code:
    efibootmgr -c -d /dev/sda -p 1 -w -L ubuntu
    Now I have to install the GRUB. If I type
    Code:
    [ -d /sys/firmware/efi ] && echo "EFI boot on HDD" || echo "Legacy boot on HDD" 
    EFI boot on HDD
    from terminal of live Ubuntu 14.04 64 bit I recognize that my system is in EFI mode.
    Then, the strange thing is that the available GRUB list doesn't contain the efi version but only the pc version.
    Code:
    dpkg -l | grep grub
    ii   grub-common                                            2.02~beta2-9                                        amd64        GRand  Unified Bootloader (common files)
    ii   grub-gfxpayload-lists                                  0.6                                                 amd64        GRUB  gfxpayload blacklist
    ii   grub-pc                                                2.02~beta2-9                                        amd64        GRand  Unified Bootloader, version 2 (PC/BIOS version)
    ii   grub-pc-bin                                            2.02~beta2-9                                        amd64        GRand  Unified Bootloader, version 2 (PC/BIOS binaries)
    ii   grub2-common                                           2.02~beta2-9                                        amd64        GRand  Unified Bootloader (common files for version 2)
    In fact, the command to install the GRUB with efi target does not work since in /usr/lib/grub there is only i386-pc version.
    Code:
     sudo  grub-install --boot-directory=/mnt/system/boot --bootloader-id=ubuntu  --target=x86_64-efi --efi-directory=/mnt/system/boot/efi --recheck  --debug /dev/sda
    The error is this
    Code:
    grub-install: error: /usr/lib/grub/x86_64-efi/modinfo.sh doesn't exist. Please specify --target or --directory.
    So how can I do? Is there a way to boot the pen drive in efi mode?

    Thank you
    Last edited by erotavlas; May 13th, 2014 at 03:40 PM.

  3. #3
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    Re: Ubuntu 14.04 UEFI boot partition and GRUB reinstall problem

    Did you install with 32 bit not 64 bit Ubuntu? Only 64 bit has the UEFI boot capability.

    Post link to BootInfo report from Boot-Repair.
    You should have grub-efi for UEFI boot and grub-pc for BIOS boot.

    See also link in my signature for more info.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  4. #4
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    Re: Ubuntu 14.04 UEFI boot partition and GRUB reinstall problem

    Quote Originally Posted by oldfred View Post
    Did you install with 32 bit not 64 bit Ubuntu? Only 64 bit has the UEFI boot capability.

    Post link to BootInfo report from Boot-Repair.
    You should have grub-efi for UEFI boot and grub-pc for BIOS boot.

    See also link in my signature for more info.
    My pen drive contains Ubuntu 14.04 64 bit and my broken system has the same version.

    The command says that I'm in EFI mode
    Code:
    [ -d /sys/firmware/efi ] && echo "EFI boot on HDD" || echo "Legacy boot on HDD" 
    EFI boot on HDD
    while the command says that the partition of pen drive is MBR and not GPT
    Code:
    GPT fdisk (gdisk) version 0.8.8
    
    Partition table scan:
      MBR: MBR only
      BSD: not present
      APM: not present
      GPT: not present
    
    
    ***************************************************************
    Found invalid GPT and valid MBR; converting MBR to GPT format
    in memory. 
    ***************************************************************
    
    
    Warning! Secondary partition table overlaps the last partition by
    33 blocks!
    You will need to delete this partition or resize it in another utility.
    Disk /dev/sdd: 7884800 sectors, 3.8 GiB
    Logical sector size: 512 bytes
    Disk identifier (GUID): 7767E483-D715-4A42-8F09-88301474149B
    Partition table holds up to 128 entries
    First usable sector is 34, last usable sector is 7884766
    Partitions will be aligned on 2048-sector boundaries
    Total free space is 2014 sectors (1007.0 KiB)
    
    Number  Start (sector)    End (sector)  Size       Code  Name
       1            2048         7884799   3.8 GiB     0700  Microsoft basic data
    Note: I created the Ubuntu live pen by using windows 7 machine.
    I took a look at your thread. I can say that I solved the problem of UEFI and I need only to reinstall GRUB. Please correct me if I'm wrong.
    What can I do?

  5. #5
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    Re: Ubuntu 14.04 UEFI boot partition and GRUB reinstall problem

    That flash drive is MBR is normal.
    It is used for both UEFI on BIOS installs. It should have one FAT32 partition.
    Why is it showing gpt partitions? Normally you do not use gpt on a flash drive installer.
    But if flash drive is used as a full install then gpt would be normal. And Windows does not always create gpt partitioning correctly nor convert from gpt to MBR correctly.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  6. #6
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    Re: Ubuntu 14.04 UEFI boot partition and GRUB reinstall problem

    Quote Originally Posted by oldfred View Post
    That flash drive is MBR is normal.
    It is used for both UEFI on BIOS installs. It should have one FAT32 partition.
    Why is it showing gpt partitions? Normally you do not use gpt on a flash drive installer.
    But if flash drive is used as a full install then gpt would be normal. And Windows does not always create gpt partitioning correctly nor convert from gpt to MBR correctly.
    Ok, how can I recover the GRUB from the live pen with Ubuntu 64 bit now that I have recovered the efi boot inside the UEFI BIOS?
    As I posted before, the command
    Code:
    dpkg -l | grep grub
    ii   grub-common                                            2.02~beta2-9                                        amd64        GRand  Unified Bootloader (common files)
    ii   grub-gfxpayload-lists                                  0.6                                                 amd64        GRUB  gfxpayload blacklist
    ii   grub-pc                                                2.02~beta2-9                                        amd64        GRand  Unified Bootloader, version 2 (PC/BIOS version)
    ii   grub-pc-bin                                            2.02~beta2-9                                        amd64        GRand  Unified Bootloader, version 2 (PC/BIOS binaries)
    ii   grub2-common                                           2.02~beta2-9                                        amd64        GRand  Unified Bootloader (common files for version 2)
    shows that I cannot install the GRUB in efi mode, in fact the command
    Code:
    sudo  grub-install --boot-directory=/mnt/system/boot --bootloader-id=ubuntu  --target=x86_64-efi --efi-directory=/mnt/system/boot/efi --recheck  --debug /dev/sda
    fails with this error
    Code:
    grub-install: error: /usr/lib/grub/x86_64-efi/modinfo.sh doesn't exist. Please specify --target or --directory.
    while the command
    Code:
    sudo  grub-install --boot-directory=/mnt/system/boot --bootloader-id=ubuntu  --target=i386-pc--efi-directory=/mnt/system/boot/efi --recheck  --debug /dev/sda
    gives back
    Code:
    Installing for i386-pc platform.
    grub-install: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
    grub-install: warning: Embedding is not possible.  GRUB can only be installed in this setup by using blocklists.  However, blocklists are UNRELIABLE and their use is discouraged..
    grub-install: error: will not proceed with blocklists.
    A confirm that the live Ubuntu is 64 bit comes from
    Code:
    uname -a
    Linux ubuntu 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
    Any suggestions?

  7. #7
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    Re: Ubuntu 14.04 UEFI boot partition and GRUB reinstall problem

    You are installing a BIOS or grub-pc version. Did you boot flash drive in UEFI mode? It can be booted from UEFI/BIOS menu in either UEFI or BIOS boot mode.
    BIOS and UEFI are not really compatible. So each has its own version of grub and once you start to boot in one mode you cannot switch to the other mode.
    Boot-Repair can help you chroot into an install and update grub or reinstall in other other version.

    Better to just use Boot-Repair.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  8. #8
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    Re: Ubuntu 14.04 UEFI boot partition and GRUB reinstall problem

    Quote Originally Posted by oldfred View Post
    You are installing a BIOS or grub-pc version. Did you boot flash drive in UEFI mode? It can be booted from UEFI/BIOS menu in either UEFI or BIOS boot mode.
    BIOS and UEFI are not really compatible. So each has its own version of grub and once you start to boot in one mode you cannot switch to the other mode.
    Boot-Repair can help you chroot into an install and update grub or reinstall in other other version.

    Better to just use Boot-Repair.
    Boot-Repair does not work and it needs to use legacy mode or BIOS mode. I tried Boot-repair and it has deleted the old GRUB. I would like to reinstall an efi version of GRUB. How can I detect if the drive is in UEFI mode?
    I think that the right command is this
    Code:
    [ -d /sys/firmware/efi ] && echo "EFI boot on HDD" || echo "Legacy boot on HDD" 
    EFI boot on HDD
    so I'm in UEFI mode.
    Is it right?

  9. #9
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    Re: Ubuntu 14.04 UEFI boot partition and GRUB reinstall problem

    I re-ran Boot-Repair. This is the message if I run "create boot info summry"
    Code:
     Boot Info Script e7fc706 + Boot-Repair extra info      [Boot-Info 23Dec2013]
    
    
    ============================= Boot Info Summary: ===============================
    
     => Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector 
        130315744 of the same hard drive for core.img. core.img is at this 
        location and looks in partition 112 for .
     => Syslinux MBR (4.04 and higher) is installed in the MBR of /dev/sdd.
    
    sda1: __________________________________________________________________________
    
        File system:       vfat
        Boot sector type:  FAT32
        Boot sector info:  According to the info in the boot sector, sda1 starts 
                           at sector 0. But according to the info from fdisk, 
                           sda1 starts at sector 2048.
        Operating System:  
        Boot files:        
    
    sda2: __________________________________________________________________________
    
        File system:       ext4
        Boot sector type:  -
        Boot sector info: 
        Operating System:  Ubuntu 14.04 LTS 
        Boot files:        /etc/fstab /boot/grub/i386-pc/core.img
    
    sda3: __________________________________________________________________________
    
        File system:       swap
        Boot sector type:  -
        Boot sector info: 
    
    sda4: __________________________________________________________________________
    
        File system:       ext4
        Boot sector type:  -
        Boot sector info: 
        Operating System:  
        Boot files:        
    
    sdd1: __________________________________________________________________________
    
        File system:       vfat
        Boot sector type:  SYSLINUX 4.07 2013-07-25
        Boot sector info:  Syslinux looks at sector 30718 of /dev/sdd1 for its 
                           second stage. SYSLINUX is installed in the /uui 
                           directory. No errors found in the Boot Parameter Block.
        Operating System:  
        Boot files:        /boot/grub/grub.cfg /casper/vmlinuz.efi 
                           /EFI/BOOT/grubx64.efi
    
    ============================ Drive/Partition Info: =============================
    
    Drive: sda _____________________________________________________________________
    
    Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
    255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 4096 bytes
    
    Partition  Boot  Start Sector    End Sector  # of Sectors  Id System
    
    /dev/sda1                   1 1,953,525,167 1,953,525,167  ee GPT
    
    
    GUID Partition Table detected.
    
    Partition    Start Sector    End Sector  # of Sectors System
    /dev/sda1           2,048       585,727       583,680 EFI System partition
    /dev/sda2         585,728   195,928,063   195,342,336 Data partition (Linux)
    /dev/sda3     195,928,064   211,552,255    15,624,192 Swap partition (Linux)
    /dev/sda4     211,552,256 1,953,523,711 1,741,971,456 Data partition (Windows/Linux)
    
    Drive: sdd _____________________________________________________________________
    
    Disk /dev/sdd: 4037 MB, 4037017600 bytes
    255 heads, 63 sectors/track, 490 cylinders, total 7884800 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    
    Partition  Boot  Start Sector    End Sector  # of Sectors  Id System
    
    /dev/sdd1    *          2,048     7,884,799     7,882,752   c W95 FAT32 (LBA)
    
    
    "blkid" output: ________________________________________________________________
    
    Device           UUID                                   TYPE       LABEL
    
    /dev/loop0                                              squashfs   
    /dev/sda1        CADB-73B5                              vfat       
    /dev/sda2        5ec28e7e-8b03-4497-924f-3ea2f2cf6713   ext4       
    /dev/sda3        8977bcd9-1adf-4cce-b8d7-c3fac5793ec0   swap       
    /dev/sda4        b3559466-a574-4ace-b6e6-c53bc95eb4fc   ext4       
    /dev/sdd1        13ED-3E27                              vfat       UUI
    
    ================================ Mount points: =================================
    
    Device           Mount_Point              Type       Options
    
    /dev             /mnt/system/dev          none       (rw,bind)
    /dev             /mnt/system/dev          none       (rw,bind)
    /dev             /mnt/system/dev          none       (rw,bind)
    /dev/loop0       /rofs                    squashfs   (ro,noatime)
    /dev/sda1        /mnt/system/boot/efi     vfat       (rw)
    /dev/sda2        /mnt/system              ext4       (rw)
    /dev/sdd1        /cdrom                   vfat       (ro,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
    
    
    =============================== sda2/etc/fstab: ================================
    
    --------------------------------------------------------------------------------
    # /etc/fstab: static file system information.
    #
    # Use 'blkid' to print the universally unique identifier for a
    # device; this may be used with UUID= as a more robust way to name devices
    # that works even if disks are added and removed. See fstab(5).
    #
    # <file system> <mount point>   <type>  <options>       <dump>  <pass>
    # / was on /dev/sda2 during installation
    UUID=5ec28e7e-8b03-4497-924f-3ea2f2cf6713 /               ext4    errors=remount-ro 0       1
    # /boot/efi was on /dev/sda1 during installation
    UUID=CADB-73B5  /boot/efi       vfat    defaults        0       1
    # swap was on /dev/sda3 during installation
    UUID=8977bcd9-1adf-4cce-b8d7-c3fac5793ec0 none            swap    sw              0       0
    UUID=b3559466-a574-4ace-b6e6-c53bc95eb4fc    /home     ext4     nodev,nosuid     0     2
    --------------------------------------------------------------------------------
    
    =================== sda2: Location of files loaded by Grub: ====================
    
               GiB - GB             File                                 Fragment(s)
    
    
    =========================== sdd1/boot/grub/grub.cfg: ===========================
    
    --------------------------------------------------------------------------------
    
    if loadfont /boot/grub/font.pf2 ; then
        set gfxmode=auto
        insmod efi_gop
        insmod efi_uga
        insmod gfxterm
        terminal_output gfxterm
    fi
    
    set menu_color_normal=white/black
    set menu_color_highlight=black/light-gray
    
    menuentry "Try Ubuntu without installing" {
        set gfxpayload=keep
        linux    /casper/vmlinuz.efi  file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper quiet splash --
        initrd    /casper/initrd.lz
    }
    menuentry "Install Ubuntu" {
        set gfxpayload=keep
        linux    /casper/vmlinuz.efi  file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper only-ubiquity quiet splash --
        initrd    /casper/initrd.lz
    }
    menuentry "OEM install (for manufacturers)" {
        set gfxpayload=keep
        linux    /casper/vmlinuz.efi  file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper only-ubiquity quiet splash oem-config/enable=true --
        initrd    /casper/initrd.lz
    }
    menuentry "Check disc for defects" {
        set gfxpayload=keep
        linux    /casper/vmlinuz.efi  cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper integrity-check quiet splash --
        initrd    /casper/initrd.lz
    }
    --------------------------------------------------------------------------------
    
    =================== sdd1: Location of files loaded by Grub: ====================
    
               GiB - GB             File                                 Fragment(s)
    
    
    =============================== StdErr Messages: ===============================
    
    cat: /tmp/BootInfo-OSfuST79/Tmp_Log: No such file or directory
    cat: /tmp/BootInfo-OSfuST79/Tmp_Log: No such file or directory
    File descriptor 9 (/proc/9080/mounts) leaked on lvscan invocation. Parent PID 16733: bash
    File descriptor 63 (pipe:[79171]) leaked on lvscan invocation. Parent PID 16733: bash
      No volume groups found
    
    ADDITIONAL INFORMATION :
    =================== log of boot-repair 2014-05-13__15h58 ===================
    boot-repair version : 3.199~ppa40~saucy
    boot-sav version : 3.199~ppa40~saucy
    glade2script version : 3.2.2~ppa47~saucy
    boot-sav-extra version : 3.199~ppa40~saucy
    boot-repair is executed in live-session (Ubuntu 14.04 LTS, trusty, Ubuntu, x86_64)
    ls: cannot access /home/usr/.config: No such file or directory
    CPU op-mode(s):        32-bit, 64-bit
    BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper quiet splash --
    
    WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
    
    
    =================== os-prober:
    /dev/sda2:Ubuntu 14.04 LTS (14.04):Ubuntu:linux
    
    =================== blkid:
    /dev/loop0: TYPE="squashfs"
    /dev/sda1: UUID="CADB-73B5" TYPE="vfat"
    /dev/sda2: UUID="5ec28e7e-8b03-4497-924f-3ea2f2cf6713" TYPE="ext4"
    /dev/sda3: UUID="8977bcd9-1adf-4cce-b8d7-c3fac5793ec0" TYPE="swap"
    /dev/sda4: UUID="b3559466-a574-4ace-b6e6-c53bc95eb4fc" TYPE="ext4"
    /dev/sdd1: LABEL="UUI" UUID="13ED-3E27" TYPE="vfat"
    
    
    1 disks with OS, 1 OS : 1 Linux, 0 MacOS, 0 Windows, 0 unknown type OS.
    
    
    WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util sfdisk doesn't support GPT. Use GNU Parted.
    
    
    WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
    
    /boot/efi detected in the fstab of sda2: UUID=CADB-73B5   (sda1)
    =================== UEFI/Legacy mode:
    Unusual EFI: Please report this message to boot.repair@gmail.com
    BIOS is EFI-compatible, and is setup in EFI-mode for this live-session.
    SecureBoot disabled. (maybe sec-boot, Please report this message to boot.repair@gmail.com)
    
    
    =================== PARTITIONS & DISKS:
    sda1    : sda,    not-sepboot,    grubenv-ok    nogrub,    no-docgrub,    no-update-grub,    32,    no-boot,    no-os,    not--efi--part,    part-has-no-fstab,    part-has-no-fstab,    no-nt,    no-winload,    no-recov-nor-hid,    no-bmgr,    notwinboot,    nopakmgr,    nogrubinstall,    no---usr,    part-has-no-fstab,    not-sep-usr,    standard,    not-far,    /mnt/system/boot/efi.
    sda2    : sda,    not-sepboot,    grubenv-ok    nogrub,    no-docgrub,    no-update-grub,    64,    with-boot,    is-os,    not--efi--part,    fstab-without-boot,    fstab-has-goodEFI,    no-nt,    no-winload,    no-recov-nor-hid,    no-bmgr,    notwinboot,    apt-get,    nogrubinstall,    with--usr,    fstab-without-usr,    not-sep-usr,    standard,    farbios,    /mnt/system.
    sda4    : sda,    maybesepboot,    no-grubenv    nogrub,    no-docgrub,    no-update-grub,    32,    no-boot,    no-os,    not--efi--part,    part-has-no-fstab,    part-has-no-fstab,    no-nt,    no-winload,    no-recov-nor-hid,    no-bmgr,    notwinboot,    nopakmgr,    nogrubinstall,    no---usr,    part-has-no-fstab,    not-sep-usr,    standard,    farbios,    /mnt/boot-sav/sda4.
    
    sda    : GPT,    no-BIOS_boot,    has-no-EFIpart,     not-usb,    has-os,    2048 sectors * 512 bytes
    
    
    =================== parted -l:
    
    Model: ATA HGST HTS541010A9 (scsi)
    Disk /dev/sda: 1000GB
    Sector size (logical/physical): 512B/4096B
    Partition Table: gpt
    
    Number  Start   End     Size    File system     Name  Flags
    1      1049kB  300MB   299MB   fat32                 boot
    2      300MB   100GB   100GB   ext4
    3      100GB   108GB   8000MB  linux-swap(v1)
    4      108GB   1000GB  892GB   ext4                  msftdata
    
    
    Model: USB 2.0 Flash Disk (scsi)
    Disk /dev/sdd: 4037MB
    Sector size (logical/physical): 512B/512B
    Partition Table: msdos
    
    Number  Start   End     Size    Type     File system  Flags
    1      1049kB  4037MB  4036MB  primary  fat32        boot, lba
    
    =================== parted -lm:
    
    BYT;
    /dev/sda:1000GB:scsi:512:4096:gpt:ATA HGST HTS541010A9;
    1:1049kB:300MB:299MB:fat32::boot;
    2:300MB:100GB:100GB:ext4::;
    3:100GB:108GB:8000MB:linux-swap(v1)::;
    4:108GB:1000GB:892GB:ext4::msftdata;
    
    BYT;
    /dev/sdd:4037MB:scsi:512:512:msdos:USB 2.0 Flash Disk;
    1:1049kB:4037MB:4036MB:fat32::boot, lba;
    
    
    =================== mount:
    /cow on / type overlayfs (rw)
    proc on /proc type proc (rw,noexec,nosuid,nodev)
    sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
    udev on /dev type devtmpfs (rw,mode=0755)
    devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
    tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
    /dev/sdd1 on /cdrom type vfat (ro,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
    /dev/loop0 on /rofs type squashfs (ro,noatime)
    none on /sys/fs/cgroup type tmpfs (rw)
    none on /sys/fs/fuse/connections type fusectl (rw)
    none on /sys/kernel/debug type debugfs (rw)
    none on /sys/kernel/security type securityfs (rw)
    none on /sys/firmware/efi/efivars type efivarfs (rw)
    tmpfs on /tmp type tmpfs (rw,nosuid,nodev)
    none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
    none on /run/shm type tmpfs (rw,nosuid,nodev)
    none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
    none on /sys/fs/pstore type pstore (rw)
    systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd)
    gvfsd-fuse on /run/user/999/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=ubuntu)
    /dev/sda2 on /mnt/system type ext4 (rw)
    /dev/sda1 on /mnt/system/boot/efi type vfat (rw)
    /dev on /mnt/system/dev type none (rw,bind)
    /proc on /mnt/system/proc type none (rw,bind)
    /sys on /mnt/system/sys type none (rw,bind)
    /dev on /mnt/system/dev type none (rw,bind)
    /proc on /mnt/system/proc type none (rw,bind)
    /sys on /mnt/system/sys type none (rw,bind)
    /bin on /mnt/system/bin type none (rw,bind)
    /bin on /mnt/system/bin type none (rw,bind)
    /dev on /mnt/system/dev type none (rw,bind)
    /proc on /mnt/system/proc type none (rw,bind)
    /sys on /mnt/system/sys type none (rw,bind)
    /dev/sda4 on /mnt/boot-sav/sda4 type ext4 (rw)
    
    
    =================== ls:
    /sys/block/sda (filtered):  alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range holders inflight power queue range removable ro sda1 sda2 sda3 sda4 size slaves stat subsystem trace uevent
    /sys/block/sdd (filtered):  alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range holders inflight power queue range removable ro sdd1 size slaves stat subsystem trace uevent
    /sys/block/sr0 (filtered):  alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range holders inflight power queue range removable ro size slaves stat subsystem trace uevent
    /dev (filtered):  autofs block bsg btrfs-control bus cdrom char console core cpu cpu_dma_latency cuse disk dri ecryptfs fb0 fd full fuse hidraw0 hidraw1 hidraw2 hpet input kmsg kvm log mapper mcelog mei mem net network_latency network_throughput null port ppp psaux ptmx pts random rfkill rtc rtc0 sda sda1 sda2 sda3 sda4 sdd sdd1 sg0 sg1 sg4 shm snapshot snd sr0 stderr stdin stdout uhid uinput urandom v4l vga_arbiter vhost-net video0 zero
    ls /dev/mapper:  control
    
    =================== hexdump -n512 -C /dev/sda1
    00000000  eb 58 90 6d 6b 64 6f 73  66 73 00 00 02 08 20 00  |.X.mkdosfs.... .|
    00000010  02 00 00 00 00 f8 00 00  3f 00 ff 00 00 00 00 00  |........?.......|
    00000020  00 e8 08 00 40 02 00 00  00 00 00 00 02 00 00 00  |....@...........|
    00000030  01 00 06 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
    00000040  00 01 29 b5 73 db ca 20  20 20 20 20 20 20 20 20  |..).s..         |
    00000050  20 20 46 41 54 33 32 20  20 20 0e 1f be 77 7c ac  |  FAT32   ...w|.|
    00000060  22 c0 74 0b 56 b4 0e bb  07 00 cd 10 5e eb f0 32  |".t.V.......^..2|
    00000070  e4 cd 16 cd 19 eb fe 54  68 69 73 20 69 73 20 6e  |.......This is n|
    00000080  6f 74 20 61 20 62 6f 6f  74 61 62 6c 65 20 64 69  |ot a bootable di|
    00000090  73 6b 2e 20 20 50 6c 65  61 73 65 20 69 6e 73 65  |sk.  Please inse|
    000000a0  72 74 20 61 20 62 6f 6f  74 61 62 6c 65 20 66 6c  |rt a bootable fl|
    000000b0  6f 70 70 79 20 61 6e 64  0d 0a 70 72 65 73 73 20  |oppy and..press |
    000000c0  61 6e 79 20 6b 65 79 20  74 6f 20 74 72 79 20 61  |any key to try a|
    000000d0  67 61 69 6e 20 2e 2e 2e  20 0d 0a 00 00 00 00 00  |gain ... .......|
    000000e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
    *
    000001f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 55 aa  |..............U.|
    00000200
    
    WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
    
    
    =================== df -Th:
    
    Filesystem     Type       Size  Used Avail Use% Mounted on
    /cow           overlayfs  3.7G  132M  3.6G   4% /
    /dev           none       3.7G   12K  3.7G   1% /mnt/system/dev
    tmpfs          tmpfs      744M  1.2M  742M   1% /run
    /dev/sdd1      vfat       3.8G  964M  2.9G  26% /cdrom
    /dev/loop0     squashfs   923M  923M     0 100% /rofs
    none           tmpfs      4.0K     0  4.0K   0% /sys/fs/cgroup
    tmpfs          tmpfs      3.7G  2.4M  3.7G   1% /tmp
    none           tmpfs      5.0M     0  5.0M   0% /run/lock
    none           tmpfs      3.7G   80K  3.7G   1% /run/shm
    none           tmpfs      100M   84K  100M   1% /run/user
    /dev/sda2      ext4        92G   17G   71G  19% /mnt/system
    /dev/sda1      vfat       285M  4.9M  280M   2% /mnt/system/boot/efi
    /dev/sda4      ext4       818G  458G  319G  59% /mnt/boot-sav/sda4
    
    =================== fdisk -l:
    
    Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
    255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 4096 bytes
    I/O size (minimum/optimal): 4096 bytes / 4096 bytes
    Disk identifier: 0x337aeafe
    
    Device Boot      Start         End      Blocks   Id  System
    /dev/sda1               1  1953525167   976762583+  ee  GPT
    Partition 1 does not start on physical sector boundary.
    
    Disk /dev/sdd: 4037 MB, 4037017600 bytes
    255 heads, 63 sectors/track, 490 cylinders, total 7884800 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x00021cd2
    
    Device Boot      Start         End      Blocks   Id  System
    /dev/sdd1   *        2048     7884799     3941376    c  W95 FAT32 (LBA)
    
    
    (debug) reinstall grub2 place-in-MBR no-BIOS_boot (sda2)
    =================== Repair blockers
    GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again.
    =================== Advice displayed in case of recommended repair
    The boot of your PC is in EFI mode, but no EFI partition was detected. You may want to retry after creating a EFI partition (FAT32, 100MB~250MB, start of the disk, boot flag).
    Do you want to continue?
    
    =================== Default settings
    Recommended-Repair
    This setting would purge (in order to fix packages fix executable) and reinstall the grub2 of sda2 into the MBR of sda.
    Additional repair would be performed: unhide-bootmenu-10s
    
    =================== Settings chosen by the user
    Boot-Info
    This setting will not act on the MBR.
    
    
    
    No change has been performed on your computer.
    while this is the message if I run recommended repair

    Code:
    GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again.
    It seems that I need necessarily a BIOS-Boot partition. Or I'm missing something...

  10. #10
    Join Date
    Jun 2009
    Location
    SW Forida
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Ubuntu 14.04 UEFI boot partition and GRUB reinstall problem

    You have grub in the MBR, but with gpt partitioning you have to have a bios_grub partition for grub to correctly install in BIOS boot mode.
    For whatever reason Boot-Repair does not see your efi partition. It looks correct as a FAT32 partition with the boot flag and partition table says it is the efi partition.
    Perhaps the issue in the partition boot sector on start of partition is an issue?
    Try this:
    sudo /sbin/fsck.vfat -V <the fat32 device>
    or:
    sudo fsck -t vfat /dev/sda1

    If that does not work, just use gparted to delete the sda1 partition. If you do have any data in it back that up first.
    And then recreate a new FAT32 partition with the boot flag using gparted.
    Or use gdisk and give it code ef00. It is in repository.
    sudo apt-get install gdisk

    GPT fdisk Tutorial - user srs5694 in forums
    http://ubuntuforums.org/showthread.php?t=1439794
    http://www.rodsbooks.com/gdisk/


    Then see if Boot-Repair sees efi partition to let you install grub-efi for UEFI boot.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

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