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Thread: Upgrading from Ubuntu 19.04 to 20.04

  1. #1
    Join Date
    Oct 2020
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    Upgrading from Ubuntu 19.04 to 20.04

    hey all. I tried to update ubuntu 20.04 and when it rebooted I think something in grub broke and now it won’t boot. ive installed ubuntu live off a usb and installed boot repair. I did the recommended repair but this didn’t work

    https://paste.ubuntu.com/p/dcv3sqmMrN/

    when I reboot I get the same
    "error: symbol ‘grub_file_filters’ not found
    entering rescue mode…
    grub rescue>

    please help.

  2. #2
    Join Date
    May 2008
    Beans
    1,029
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: Upgrading from Ubuntu 19.04 to 20.04

    There is no direct upgrade path from 19.04 to 20.04.

    Your Windows OS is hibernating (lines 34 - 36 in the report).

    Suggestion:-

    Disable, de-activate or remove device sda from your PC.

    Can you boot into Windows, disable Fast Start Up and power off?

    Then, post back here when your Windows OS is OK.

  3. #3
    Join Date
    Aug 2009
    Location
    United States
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    4,512
    Distro
    Ubuntu Development Release

    Re: Upgrading from Ubuntu 19.04 to 20.04

    Ask oldfred is a bit of a mess he can give you best advice.
    oldfred

    Last edited by garvinrick4; 4 Weeks Ago at 12:43 AM.
    Remember hence where you come and pass it down.
    Ubuntu Forums member #899097 and Ubuntu Member:


  4. #4
    Join Date
    Jun 2009
    Location
    SW Forida
    Beans
    Hidden!
    Distro
    Ubuntu

    Re: Upgrading from Ubuntu 19.04 to 20.04

    Tea for one has reviewed Boot-Repair's report and is correct on first turning off Windows fast start up.
    I am not as knowledgeable on LVM. If encrypted you have to manually mount before running Boot-Repair.
    And Best with two drives to not run Boot-Repair's autofix. You want to keep Windows boot loader in MBR of Windows drive.
    You often need to be able to directly boot Windows.
    If Boot-Repair does not offer in Advanced mode to install syslinux boot loader to MBR of mmc drive, you can manually do it.
    But often better to use your Windows repair flash drive as other repairs may also be required.

    Not sure which is correct, may depend on version of Linux used on which path is syslinux.
    sudo apt-get install syslinux
    sudo dd if=/usr/lib/syslinux/mbr.bin of=/dev/mmcblk0
    sudo dd if=/usr/lib/syslinux/mbr/mbr.bin of=/dev/mmcblk0

    What brand/model system?
    Most with the mmc type drives are very lightweight systems. Is sda then an external drive?
    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.

  5. #5
    Join Date
    May 2008
    Beans
    1,029
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: Upgrading from Ubuntu 19.04 to 20.04

    Quote Originally Posted by oldfred View Post
    What brand/model system?
    Most with the mmc type drives are very lightweight systems. Is sda then an external drive?
    Some of the newer lightweight netbooks/laptops come with two drives because I purchased a similar cheap 'n' cheerful model 15 months ago.

    The mmcblk0 drive is usually inaccessible and soldered to the motherboard.

    The sda drive may be a M.2 form factor accessed (and removable) via a little door on the underneath of the laptop.

    Of course, it could also be an external device and the OP should let us know.

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