Grub not showing/ discovering Win10

rhysers · 10-25-2020, 05:51 PM

Ok, so problem is as described in subject: grub doesn’t seem to know about win10 installation. It’s a brand new hard drive and I decided to just do fresh installs of bot Ubuntu and win10. Due to install failure on Ubuntu when trying to install Windows first, I decided to wipe the disk and install Ubuntu first. Clean install. Then I made an NTFS partition and ran the windows installer, instructing it to install to the NTFS partition. Successful install. However, grub only offers options for Ubuntu. Tried update-grub and the grub customizer, although I’m not really sure what to put in the script block. I tried to copy paste a couple thing s I googled, but they didn’t work. Windows boots fine if I choose the correct option in BIOS/UEFI, but I’d like to be able to choose it from grub. Here’s screenshots of the Windows disk manager, Ubuntu disks, and lsblk. Couldn’t find anything helpful on google so hopefully someone knows how to fix.
Files to big to attach: https://imgur.com/a/CdU7iIo

colorpurple21859 · 10-25-2020, 07:07 PM

I have a feeling you mixing uefi and legacy booting.
Boot into ubuntu, post the output of

Code:

cat /sys/firmware/efi
sudo ls /boot/efi/EFI
sudo parted -l

and the contents of your /etc/fstab

rhysers · 10-29-2020, 12:13 AM

Quote:

Originally Posted by colorpurple21859

I have a feeling you mixing uefi and legacy booting.

I came back to post that I had figured it out before I saw this, and you were indeed correct. Getting them both on UEFI solved the problem.

Many Thanks!

colorpurple21859 · 10-29-2020, 05:05 AM

Good you got it figured out.