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Can't dual-boot windows and linux - no luck with bcedit and grub option doesn't exist

br flag

Aight. I'm a bit of a noob so bear with me.

A while ago I decided to dual-boot Ubuntu alongside windows 10. Went all smooth but I noticed that grub didn't show up on boot. Still, found a way to launch into ubuntu using the windows advanced recovery options menu so I left it.

Decided I wanted to use Ubuntu again a while later. Perhaps a few Windows updates have passed. I can't seem to get into Ubuntu anymore. I tried advanced recovery options but I can't find the option to choose operating system from Windows.

I tried bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi; operation completed successfully but had no effect. Still no grub.

Then I tried to modify the boot order. Grub doesn't show up in the list of available options, and there are two identical windows options? So I looked for an option to add another boot option but there wasn't any such option anywhere in BIOS settings.

Any further suggestions?

HomerSimpson avatar
sa flag
Use the USB-stick/DVD you used to install Ubuntu to boot from it. If you don't have that anymore make one with 'Balena Etcher', 'Ventoy' 'Unetbootin' or 'Rufus'. Choose the option 'Try Ubuntu'. Then open the terminal and type ```sudo apt install grub```. This will reinstall 'Grub2'. Then type ```sudo update-grub```. In both cases you will be asked to put in your password (sudo=SuperUserDo). Shutdown the computer, remove the medium, and restart ( from your harddisk).
oldfred avatar
cn flag
Do not install grub as that is grub legacy. Which grub2 you want depends on if UEFI grub-efi-amd64 or BIOS grub-pc. And from live installer you have to mount install partition to correctly install grub. Easier to use Boot-Repair for newer users. Please copy & paste the pastebin link to the Bootinfo summary report ( do not post report), do not run the auto fix till reviewed.Lets see details, use ppa version with your USB installer (2nd option) or any working install, not Boot-Repair ISO https://help.ubuntu.com/community/Boot-Repair
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