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Thread: Ubuntu/eOS not booting because of "efidisk read error".

  1. #11
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    Re: Ubuntu/eOS not booting because of "efidisk read error".

    Are you still booting with the BIOS mode as when converted to UEFI, the BIOS mode will give those type of errors as it is not really configured correctly, but may manually boot.

    If in UEFI mode, do you get a grub menu?
    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.

  2. #12

    Re: Ubuntu/eOS not booting because of "efidisk read error".

    So I just made photos of it so you might imagine more of it , thank you for staying on this thread for so long so far !
    Attached Images Attached Images

  3. #13
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    Re: Ubuntu/eOS not booting because of "efidisk read error".

    CSM is BIOS boot. You want UEFI boot so try changing CSM to disabled.
    UEFI Compatibility Support Module (CSM), which emulates a BIOS mode


    But I think you may still be booting in UEFI mode? Some systems boot either way depending on settings.

    Does Windows boot or do you get grub from Windows boot entry?
    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. #14

    Re: Ubuntu/eOS not booting because of "efidisk read error".

    windows boots because I changed the boot priority, even though grub doesn't even start anymore except sometging like in picture 2 and 3. also i tried to disable CSM, but it won't help either.

  5. #15
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    Re: Ubuntu/eOS not booting because of "efidisk read error".

    Try Boot-Repair again to re-install grub. Be sure to boot in UEFI mode and reinstall grub in efi.

    If Boot-Repair offers a 'buggy' UEFI fix say no. That is only for computers that do not boot an ubuntu entry from UEFI. Some vendors modify UEFI to only boot the Windows entry.
    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. #16

    Re: Ubuntu/eOS not booting because of "efidisk read error".

    If I am in UEFI mode, how can I repair it then in EFI mode?

  7. #17
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    Re: Ubuntu/eOS not booting because of "efidisk read error".

    You boot in either UEFI or BIOS from live installer. Or is your Ubuntu is working you can boot in UEFI mode from hard drive. Just do not boot in BIOS mode from any device.
    UEFI menu should show the two boot options.

    From live DVD or flash drive, you get grub menu if in UEFI mode or accessiblity screen with BIOS.
    Shows install with screen shots for both BIOS & UEFI, so you know which you are using.
    https://help.ubuntu.com/community/UEFI
    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. #18

    Re: Ubuntu/eOS not booting because of "efidisk read error".

    Still not working, http://paste.ubuntu.com/7067255

  9. #19
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    Re: Ubuntu/eOS not booting because of "efidisk read error".

    Boot-Repair shows this extract from your UEFI. Can you boot both Windows and Elementary?
    BootOrder: 0000,0002,0003
    Boot0002* Windows Boot Manager
    Boot0003* UEFI: Sony Storage Media 1.00
    Boot0000* elementary
    This entry added by Boot-Repair in grub menu should boot Windows also.
    menuentry "Windows UEFI bootmgfw.efi"
    This entry from the buggy os-prober will not work. New versions of grub in 13.10 fixed this bug.
    menuentry "Windows 8 (loader) (on /dev/sda4)"
    Last edited by oldfred; March 10th, 2014 at 04:56 PM.
    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.

  10. #20

    Re: Ubuntu/eOS not booting because of "efidisk read error".

    I can only boot Windows, which is fine. But if I try to boot eOS it says "Kernel not found", which shouldn't be true, because it worked perfectly before I repaired the problem with Windows. Since I used Boot Repair to fix the Windows bug where it won't boot, I got that problem with that Kernel.

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