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fdisk -lI recently installed UbuntuDDE 20.04 LTS to be able to dual boot with Windows 10. After following the instructions online, I was able to get it up and running. However, after shutting down my PC and trying to boot into Windows 10, I get the message "System bootloader not found. Initializing Defaults." and then it would send me back to the startup menu.

I tried to boot back into UbuntuDDE, but it also failed and sent me back to the startup menu. I also don't seem to have a GRUB menu either. It would be my UEFI prompting for my boot device options.

EDIT: This is what I got after typing the commands after booting Ubuntu setup through my USB: After typing in bootctl

Is there any sort of way I can get this fixed?

After typing in efibootmgr and find /boot/efi

EDIT3: sudofdisk -l enter image description here enter image description here enter image description here

  • In your BIOS have you tried booting from other disks? The boot-loader is pointed to a disk without a boot-loader so you may have selected the wrong boot device. – Stewart Sep 1 at 6:44
  • You could try booting from a liveCD, then installing grub with something like sudo grub-install /dev/sda. There are some good suggestions here – Stewart Sep 1 at 6:46
  • @Stewart It's 2020, so hopefully not many people still rely on the legacy BIOS CSM. OP also mentions UEFI, so there are no "boot devices" or bootloaders embedded in initial sectors. The bootloader is just a file on the EFI System Partition and the corresponding boot entries need to be managed through efibootmgr. – TooTea Sep 1 at 11:39
  • Please boot from a live USB and then edit your question, adding the output of bootctl (if available), efibootmgr -v and find /boot/efi. – TooTea Sep 1 at 11:44
  • Grub only boots working Windows. Does Windows have fast startup on, or need chkdsk. Can you boot Windows directly from UEFI boot menu and turn fast start up off? askubuntu.com/questions/843153/… & askubuntu.com/questions/145902/… – oldfred Sep 1 at 13:49

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