Windows equivalent to efibootmgr?
Solution 1
On Windows you can use "bcdedit /enum firmware
" to list all firmware applications, then
"bcdedit /set {fwbootmgr} bootsequence {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
" to set BootNext option.
Solution 2
Don't you have to create UBuntu loader similar to {9b4692db-d6e1-11e6-8040-f733056555ec}?
Basically the ubuntu node should be changed from boot manager to boot loader app.
Then have a boot manager at EFI\Boot\bootx64.efi.
Create a {bootmgr} node for boot manager. Set its displayorder to include both the guids above. Then set the default value for {bootmgr} to ubuntu guid. That should make ubuntu item sticky across reboots.
Naveen Unnikrishnan
Updated on June 11, 2022Comments
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Naveen Unnikrishnan almost 2 years
Windows keeps overriding the UEFI boot order even if I change it with efibootmgr from Ubuntu. However BootNext option is not overridden, that is, I can set BootNext to Ubuntu and it boots into Ubuntu upon rebooting. I, therefore wrote the following script to run every time I boot into Ubuntu :
efibootmgr > file.txt CURR="$(grep "BootCurrent" file.txt | grep -Eo "[0-9]{4}")" efibootmgr -n $CURR rm file.txt exit 0
This ensures that I can boot into grub when I reboot from Ubuntu. Is there a way to do the same from Windows so that I can boot into grub when rebooting from Windows?
EDIT :
Running bcdedit /v gives (No Ubuntu entry):
Windows Boot Manager -------------------- identifier {9dea862c-5cdd-4e70-acc1-f32b344d4795} device partition=\Device\HarddiskVolume1 path \EFI\ubuntu\shimx64.efi description Windows Boot Manager locale en-US inherit {7ea2e1ac-2e61-4728-aaa3-896d9d0a9f0e} default {9b4692db-d6e1-11e6-8040-f733056555ec} resumeobject {9b4692da-d6e1-11e6-8040-f733056555ec} displayorder {9b4692db-d6e1-11e6-8040-f733056555ec} toolsdisplayorder {b2721d73-1db4-4c62-bf78-c548a880142d} timeout 0 Windows Boot Loader ------------------- identifier {9b4692db-d6e1-11e6-8040-f733056555ec} device partition=C: path \WINDOWS\system32\winload.efi description Windows 10 locale en-US inherit {6efb52bf-1766-41db-a6b3-0ee5eff72bd7} recoverysequence {9b4692dc-d6e1-11e6-8040-f733056555ec} displaymessageoverride Recovery recoveryenabled Yes isolatedcontext Yes allowedinmemorysettings 0x15000075 osdevice partition=C: systemroot \WINDOWS resumeobject {9b4692da-d6e1-11e6-8040-f733056555ec} nx OptIn bootmenupolicy Standard
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facetus almost 4 yearsbcdedit changes the Windows loader, while efibootmgr in fact modifies UEFI. Windows loader may refuse to load what UEFI will happily do.