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  1. Re: Reinstalling Ubuntu as main OS after removing dual-boot (Black screen)

    If UEFI system, do not use CSM.
    With Rufus use the UEFI/gpt option which creates an installer that only works in UEFI mode. Other tools may make an installer that will work in both modes.
    Setting...
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    [SOLVED] Re: which swap is used by which OS

    UEFI requires an ESP which is FAT32.
    But you are using MBR(msdos). UEFI wants gpt, but if a drive already is MBR, Ubuntu will not make you change it to gpt to prevent data loss.
    Windows in UEFI...
  3. [SOLVED] Re: Trying to install 20.04 over 19.04 -- 'Partitions' problems

    Rufus creates a UEFI only UEFI/gpt or a BIOS only CSM/MBR installer.
    Did you create the UEFI version?

    Other install tools create the installer that can be booted in either boot mode UEFI or...
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    [SOLVED] Re: which swap is used by which OS

    You can see swap partition with this:
    sudo parted -l
    or this which also shows UUID if a partition.
    lsblk -f

    Swap mounted by fstab:
    cat /etc/fstab
    If swap partition it will be something like...
  5. [SOLVED] Re: How can I add missing partition numbers (similar to renumbering)

    Not recommended.
    And renumbering often causes issues for anything that is using device like /dev/sdX.
    Most now use UUID, and that should not change, but if that changes, you have major issues.
    ...
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    [other] Re: Install OS-independent Grub2

    I have installed grub to flash drives by itself, in both old BIOS and newer UEFI modes.
    But had to totally do the grub.cfg boot stanza myself as grub does not have an install with the additional...
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    Re: The New Apple M1 Chip

    There is a lot of RISC-V info. That may be a new processor that gets used if price comes down.
    ...
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    Re: "update-grub" command question

    You will still only have one bootable system.
    You cannot have duplicate UUIDs mounted at same time. If actually mounted, it may use one partition, one time & next the next time, totally getting them...
  9. Thread: 21.04 beta

    by oldfred
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    [SOLVED] Re: 21.04 beta

    I have not done a conversion.
    Not sure if just installing the UEFI version of grub is all that is needed, I think it may need grub-install.

    I think it will want to know the ESP - efi system...
  10. Re: Hard disk disappeared from ubuntu still visible in Win 7 dual boot

    Do not mix an ESP which does have boot files for UEFI booting, and has to be FAT32 with a /boot partition which has to have a Linux format for kernel & boot files.

    Most desktops do not need a...
  11. Thread: 21.04 beta

    by oldfred
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    [SOLVED] Re: 21.04 beta

    A bios_grub is only required for BIOS/CSM/Legacy installs on gpt partitioned drives. It normally is 1MB and must be unformatted.

    UEFI & BIOS are not compatible.
    Once you start booting from UEFI...
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    Re: The New Apple M1 Chip

    There is also this experimental version:
    Linux on M1
    https://corellium.com/blog/linux-m1
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    [SOLVED] Re: Help with new Z490 build

    Post details and any info on settings you may have had to make.
    Then others can find thread and it will help them.
  14. [ubuntu] Re: boot repair doesn't show any recommended repair

    You show UEFI system with both Windows & Ubuntu installed in UEFI mode.
    And Boot-Repair booted in UEFI mode, but it seems to say at end it would do a legacy/BIOS install which is wrong.

    From UEFI...
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    Re: Grub recovery not successful

    If you look at boot repair report it has a Windows BCD setting.
    Some systems sync BCD with UEFI, so whatever is in BCD will be UEFI. That may be why booting Windows resets boot order.

    There are...
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    Re: Grub recovery not successful

    https://help.ubuntu.com/community/Grub2/Setup#Specific_Entries

    I think your description entry has too much. It should be just what os-prober would have grub menu show.
    Probably just
    'Windows...
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    [ubuntu] Re: path to backup partition confuses me

    That then is all per the defaults.
    If you want it mounted anywhere else, you have to specify in fstab.

    I do not like Disks as it may not use correct parameters. Better to use template/example and...
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    Re: Grub recovery not successful

    I do not know if it is going to show anything or not, but run a new copy of the report from Boot-Repair and post link.
    Do not run any suggested autofixes.
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    Poll: Re: Partition Setup

    My partitions:

    fred@z170-focal-k:~$ lsblk -o NAME,LABEL,PARTLABEL,SIZE,fsused,MOUNTPOINT | egrep -v "^loop"
    NAME LABEL PARTLABEL SIZE FSUSED MOUNTPOINT
    sda ...
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    Re: Grub recovery not successful

    Change this as also shown in tea for one's version:
    GRUB_TIMEOUT_STYLE=hidden
    to this:
    GRUB_TIMEOUT_STYLE=menu

    sudo nano -B /etc/default/grub
    Control x and save when exiting.
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    [ubuntu] Re: path to backup partition confuses me

    File browser now creates new mounts in /media/$USER, it used to not include the user.

    So if you created a partition with the label backup, it would auto mount to /media/$USER/backup.
    If internal...
  22. [ubuntu] Re: Error on running boot-repair - "Please create a ESP partition" (BootInfo included

    UEFI & BIOS/MBR boot on same drive is not normally possible.
    Windows in BIOS mode requires MBR partitioning and must have boot flag on the primary NTFS partition with its boot files.
    But UEFI...
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    Re: Grub recovery not successful

    I did not see this in your Boot-Repair summary report.
    Post this in code tags.

    cat /etc/default/grub
  24. [ubuntu] Re: Error on running boot-repair - "Please create a ESP partition" (BootInfo included

    Besides UEFI Secure Boot setting are multiple other UEFI settings. Most do not matter and it varies by brand.
    On my Asus motherboard I change 7 or 8 settings, some required & others optional.
    My...
  25. [ubuntu] Re: Error on running boot-repair - "Please create a ESP partition" (BootInfo included

    You show an ESP, but if Boot-Repair cannot see it, it must have some issue.
    Is Windows fast start up off?
    Did Windows do an UEFI update & you have a default UEFI setting that secures or locks...
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