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Thread: Error while mounting /sys/firmware/efi/efivars

  1. #1
    Join Date
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    Error while mounting /sys/firmware/efi/efivars

    When booting from the latest USB Live, Raring amd64 on EFI (13-03-08), I get "an error occured while mounting /sys/firmware/efi/efivars".

    If I ignore this message, the system reaches Unity, I'm able to proceed with an EFI install which completes without any errors, but upon rebooting the machine, it hangs on boot.

    Any idea why I get this error from the USB Live?

  2. #2
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    Re: Error while mounting /sys/firmware/efi/efivars

    Investigating a bit further the installed EFI system also hangs with mountall reporting "an error occurred while mounting /sys/firmware/efi/firmware/efivars [1008] terminated with status 32.

    I have two different systems experiencing the same problem (both Asus EFI Bioses, different models) with the latest 3.8.0-11-generic #20 kernel.

    Assitance would be appreciated

  3. #3
    Join Date
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    Ubuntu 12.04 Precise Pangolin

    Re: Error while mounting /sys/firmware/efi/efivars

    I have the same problem on my Fujitsu T902 running freshly updated 13.04. I used boot-repair two times when the first time left me unbootable, but then it also showed "an error occured while mounting /sys/firmware/efi/efivars". I then just pressed S to skip and it continues to the Unity log-in screen and everything works

  4. #4
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    Re: Error while mounting /sys/firmware/efi/efivars

    Bump! I can't believe we are only two experiencing this when I have to machines affected.

    Could anyone give me some pointers on what's happening and how to fix this?

  5. #5
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    Ubuntu 14.04 Trusty Tahr

    Re: Error while mounting /sys/firmware/efi/efivars

    Not sure if this may be the issue or not.
    But UEFIs have a shell that you can use to work with UEFI. It is like the command line in grub or Ubuntu.
    But not all UEFI include the shell, so the tools to extract the data are not there.

    Do you have this entry and does it get you to a shell?
    EFI/boot/bootx64.efi.efi" ---> Brings up 'EFI shell environment' with command prompt.

    https://help.ubuntu.com/community/UE...ing#UEFI_Shell


    Launch EFI Shell from File System Device
    https://wiki.archlinux.org/index.php...ace#UEFI_Shell
    http://software.intel.com/en-us/arti...and-scripting/
    UEFI generic shim - Secure Boot bootloader
    http://mjg59.dreamwidth.org/20303.html
    Last edited by oldfred; March 10th, 2013 at 12:33 AM.
    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.







  6. #6
    Join Date
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    Ubuntu 12.04 Precise Pangolin

    Re: Error while mounting /sys/firmware/efi/efivars

    Thanx for your reply, unfortunately I do not understand how to get to EFI/boot/bootx64.efi.efi

    After finding this, I guess it is a kernel bug in current 13.04 kernel, I did not experience this with 3.8.0.9 but after updating to 3.8.0.11: https://bugs.launchpad.net/ubuntu/+s...x/+bug/1146868
    I do have /sys/firmware/efi/efivars and there are no files in it. Comment #8 seems to be the solution but I have no idea how to do this.

    Updated to 3.8.0-12-generic, problem is gone. In /sys/firmware/efi/efivars I now have 93 files, before there was none.
    Last edited by Cobuntu; March 11th, 2013 at 11:00 PM.

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