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Thread: Issue establishing dual boot capability

  1. #11
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    Re: Issue establishing dual boot capability

    It was my understanding that Microsoft required vendors to allow users to turn off UEFI Secure Boot.
    So Acer must have a way or it is in violation of its contract with Microsoft on installing Windows.

    Most UEFI also allow boot of a fall back or drive entry. I do not see that entry in your UEFI.
    Fallback or drive boot entry for internal drive is same as for an external drive or /EFI/Boot/bootx64.efi.
    You show that in your ESP, but no entry in UEFI to boot it. Not then sure if you have some way to get it to work in UEFI settings, to add it to UEFI menu.

    I have used rEFInd as emergency boot and it does work. Not sure if then it works with Secure Boot on?
    UEFI boot install & repair info - Regularly Updated :
    https://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  2. #12
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    Re: Issue establishing dual boot capability

    This Acer V3-572G does not have 'Trust' capability.

    Have not been able to use Control-S to get to additional EUVE settings.

    Boot EUVE Enabled, Secure Boot Enabled -
    Pastebin: http://paste.ubuntu.com/p/YC9MHyqJ6K/

    In menu EUVE -> Security there is a line, Set Supervisor Password: There is an explanation that reads, "Supervisor Password controls access to the whole setup utility. It can be used to bootup when Password on boot is enabled.
    I set an Admin password and was allowed to Disable Secure Boot. Wow, how devious!
    There are two additional settings for User and Disk that can enabled in EUVE setup. I wonder if I should set passwords for those and see what additional privileges will open up. Once set, they can be disabled also, or returned to default state.

    Changing the UEVE boot order and plugging in a bootable USB SSD to get a Grub menu wit all operating systems
    - I can not get consistent results with this method.

    Boot EUVE Enabled, Secure Boot Disabled -
    Pastebin: http://paste.ubuntu.com/p/TrwnMVTqp2/

    Will wait for additional suggestions before proceeding.
    Cheers,


    The Linux Command Line at http://linuxcommand.org/

  3. #13
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    Re: Issue establishing dual boot capability

    Quote Originally Posted by him610 View Post
    Boot EUVE Enabled, Secure Boot Disabled -
    Pastebin: http://paste.ubuntu.com/p/TrwnMVTqp2/
    From this report UEFI and Secure Boot Disabled

    Lines 334 - 339 look promising:-
    Suggested repair:
    The default repair of the Boot-Repair utility would reinstall the grub-efi-amd64-signed of sda5,
    using the following options: sda2/boot/efi,
    Additional repair would be performed: unhide-bootmenu-10s win-legacy-basic-fix use-standard-efi-file restore-efi-backups
    In the previous reports, I haven't seen anything this positive yet.

    However, there is one thing a bit mysterious in Lines 90 - 98 - a number of unknown devices containing ubuntu\shimx64.efi

    Possibly left over from previous boot fix attempts? . On second thoughts, they are probably the entries when booting the USB SSD, I'm not completely sure.

    Anyway, I'm a bit bullish about these thing and I would give the boot repair a shot with Secure Boot Disabled in UEFI mode.

    Keep your back-ups safe .
    Last edited by tea for one; June 30th, 2021 at 08:40 PM. Reason: Added second thoughts

  4. #14
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    Re: Issue establishing dual boot capability

    The unknown is typical and unique of Acer as it defaults to that until you enable "trust" and manually in UEFI rename the entry.
    Not sure why duplicates, but they can be deleted. Perhaps just from multiple installs of grub.
    UEFI boot install & repair info - Regularly Updated :
    https://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  5. #15
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    Re: Issue establishing dual boot capability

    A couple of days ago I ordered a a 2-1/2 inch HDD/SSD caddy to place in the empty DVD/CD bay - it actually had a spacer in it. The caddy arrived today so I installed the 120GB SSD I had been using as a USB SSD which explains the SDB entries. SDC is the Boot Repair device.
    Here are latest results -

    Boot Repair EUVE Enabled, Secure Boot Disabled -
    Pastebin: http://paste.ubuntu.com/p/ZkYmzC6bCX/

    Attempted to boot the laptop after repairs.
    Checked the EUVE settings. All settings are as before; although, boot priority list does not show either 20.04.2 installation. Pressed the F12 key on reboot - the only option listed was Windows Boot Manager.

    In Win10, ran from admin command #
    bcdedit /set/{bootmgr} path \EFI\ubuntu\shim64x.efi
    Response: The operation completed successfully

    Shutdown completely, waited awhile, rebooted system; system booted straight into Windows.

    I think I will call it an evening; will begin tomorrow with clear mind and renewed vigor.
    Cheers,


    The Linux Command Line at http://linuxcommand.org/

  6. #16
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    Re: Issue establishing dual boot capability

    First issue is Windows fast start up is on. Windows turns it back on with updates.
    The disk contains an unclean file system (0, 0).
    Metadata kept in Windows cache, refused to mount.
    Falling back to read-only mount because the NTFS partition is in an
    unsafe state. Please resume and shutdown Windows fully (no hibernation
    or fast restarting.)
    Windows is hibernated, refused to mount.
    You now have many more "unknown" devices. You need to delete them all, re-install grub once with Boot-Repair's advanced mode, and then using UEFI settings enable trust and rename the one new entry.
    UEFI boot install & repair info - Regularly Updated :
    https://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  7. #17
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    Re: Issue establishing dual boot capability

    Now that you have solved the dilemma of UEFI with Secure Boot Disabled and added a second disk, you have better additional options.

    Original disk for Windows 10
    New disk for Ubuntu
    Both installations UEFI mode with GPT
    Boot from UEFI is then possible via respective boot managers even if Grub is misbehaving.
    Easier to manage when each OS has its own disk.

    As mentioned by olfred, Windows fast start up needs attention.

    Also, you may have noticed in the report that, since you added the second disk, you have 3 OS installations.

    Line 245 OS#1: Ubuntu 20.04.2 LTS on sda5
    Line 246 OS#2: Ubuntu 20.04.2 LTS on sdb5
    Line 247 OS#3: Windows 10 on sda4

  8. #18
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    Re: Issue establishing dual boot capability

    1 July 2021 (09:13 am EDT
    Accessed EUVE, just in case access is needed for these two settings, set the User and Disk passwords. Now the Acer boot process asks for the password when the system is booted. Still no option to turn off Fast Boot as recommended by oldfred. There must be a way to disable Fast Boo; just need to discover it.

    Running the Boot Repair diagnostics
    Boot Repair EUVE Enabled, Secure Boot Disabled -
    Pastebin: http://paste.ubuntu.com/p/9kGQDc6Syr/

    I will see if I can delete excess shimx64.efi files.
    Cheers,


    The Linux Command Line at http://linuxcommand.org/

  9. #19
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    Re: Issue establishing dual boot capability

    Quote Originally Posted by him610 View Post
    1 July 2021 (09:13 am EDT
    Still no option to turn off Fast Boot as recommended by oldfred.
    Fast Boot is a UEFI setting
    fastboot can be a grub parameter

    oldfred was referring to Fast Start Up, which is a hibernation setting within Windows.

  10. #20
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    Re: Issue establishing dual boot capability

    Fast boot is an UEFI setting. Best to have that off as system will boot using previous configuration, even if you are changing it.

    Fast start up is a Windows setting that sets hibernation flag, so Windows can boot faster.
    Fast Start up off (always on hibernation), note that Windows turns this back on with updates, SHIFT + Shut down button
    http://ubuntuforums.org/showthread.p...2#post13488472
    http://www.tenforums.com/tutorials/4...dows-10-a.html
    http://www.tenforums.com/tutorials/2...dows-10-a.html
    https://www.windowscentral.com/how-d...0-fast-startup
    UEFI boot install & repair info - Regularly Updated :
    https://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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