Windows 11, Ubuntu Dual Boot GRUB


Sandi1987

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OS
Windows 11
I have Dual Boot Windows 11 and Ubuntu. Will Windows Updates removed GRUB and EFI Partition or if i re-install Windows?
 
Last edited:

My Computer

System One

  • OS
    Windows 11

jbcarreon123

C:\> echo ^<jbcarreon123^>
Power User
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Location
Quezon City, Philippines
OS
Windows 11 [Insider (Enrolled using OfflineInsiderEnroll)], Linux Mint, Zorin OS
No. grub-install will install GRUB on [ESP]/EFI/grub or [ESP]/EFI/ubuntu.
But, after you will install (or update) Windows, Windows will register on the UEFI boot manager, hence you will not boot to Ubuntu.

{EDIT}
 

My Computer

System One

  • OS
    Windows 11 [Insider (Enrolled using OfflineInsiderEnroll)], Linux Mint, Zorin OS
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Vostro 270s
    CPU
    Core i3 2100 3.2Ghz
    Memory
    4gb DDR3-1333
    Graphics Card(s)
    iGPU
    Sound Card
    Realtek
    Monitor(s) Displays
    HP Compaq LA2006x
    Screen Resolution
    900p
    Hard Drives
    Patriot Burst 240GB SATA III SSD
    Internet Speed
    40MBit/s
    Browser
    Firefox [recently switched]
    Antivirus
    WD
    Other Info
    Second-hand PC,
    No TPM, having WDDM 1.2, unsupported CPU.
    Installed Windows 11 using the registry hack..
    Clean installed even Windows 10

Sandi1987

Member
Thread Starter
Local time
4:12 PM
Posts
32
OS
Windows 11
I found solution.

Convert Windows 11 from UEFI to Legacy, install Ubuntu and convert back to UEFI after Ubuntu installation.
 

My Computer

System One

  • OS
    Windows 11

jbcarreon123

C:\> echo ^<jbcarreon123^>
Power User
VIP
Local time
10:12 PM
Posts
1,074
Location
Quezon City, Philippines
OS
Windows 11 [Insider (Enrolled using OfflineInsiderEnroll)], Linux Mint, Zorin OS
I found solution.

Convert Windows 11 from UEFI to Legacy, install Ubuntu and convert back to UEFI after Ubuntu installation.
Unnecessary. Install Windows on UEFI, and then install Ubuntu on UEFI, hence you will boot straight to GRUB and you will see:
Code:
Ubuntu
Advanced Options for Ubuntu
Windows Boot Manager (on /dev/sda2)

To make sure Windows will boot to GRUB even after Windows Updates, use this command on Administrative Command Prompt:
Batch:
bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi

If you can't see Windows in the Boot options, type this command in the Linux Terminal:
Code:
$ sudo update-grub
1653874397118.png
 
Last edited:

My Computer

System One

  • OS
    Windows 11 [Insider (Enrolled using OfflineInsiderEnroll)], Linux Mint, Zorin OS
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Vostro 270s
    CPU
    Core i3 2100 3.2Ghz
    Memory
    4gb DDR3-1333
    Graphics Card(s)
    iGPU
    Sound Card
    Realtek
    Monitor(s) Displays
    HP Compaq LA2006x
    Screen Resolution
    900p
    Hard Drives
    Patriot Burst 240GB SATA III SSD
    Internet Speed
    40MBit/s
    Browser
    Firefox [recently switched]
    Antivirus
    WD
    Other Info
    Second-hand PC,
    No TPM, having WDDM 1.2, unsupported CPU.
    Installed Windows 11 using the registry hack..
    Clean installed even Windows 10
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