View Full Version : [kubuntu] Can't boot into windows after Ubuntu install.

October 20th, 2018, 06:26 AM

I had a functioning W10/Ubuntu dual boot system and decided to install Kubuntu in replacement of Ubuntu 16.04. The system just boots straight into Kubuntu with no Grub options.
I have run a boot info script shown below.

Boot Info Script 0.61 [1 April 2012]

============================= Boot Info Summary: ===============================

============================ Drive/Partition Info: =============================

no valid partition table found
"blkid" output: __________________________________________________ ______________


/dev/loop0 squashfs
/dev/loop1 squashfs
/dev/loop2 squashfs
/dev/nvme0n1p1 E282D97C82D9559F ntfs Recovery
/dev/nvme0n1p2 B6D9-E4A6 vfat
/dev/nvme0n1p4 FA10DEB210DE755B ntfs
/dev/nvme0n1p5 2f5b92bf-e823-4d44-b0e1-e3bdd16adced ext4
/dev/nvme0n1p6 74da5874-c508-42a1-a532-444bb5be6793 swap
/dev/nvme0n1p7 05ebb6ec-431a-406e-ac26-ce92d5f41d84 ext4

================================ Mount points: =================================

Device Mount_Point Type Options

/dev/nvme0n1p5 / ext4 (rw,relatime,errors=remount-ro,data=ordered)
/dev/nvme0n1p7 /home ext4 (rw,relatime,data=ordered)

Here is a Gparted screen.
Any help greatly appreciated.

October 20th, 2018, 01:56 PM
I would suggest you get a more updated bootinfoscript which you can do at the site below. Use the 2nd option to add a ppa in Kubuntu and after downloading it, run it by selecting the Create BootInfo Summary option and do NOT try to make any repairs. When it finishes, it will give you a link to post here, do that. The bootinfo you posted doesn't have enough information to tell much about your system other than that you have both Linux and windows partitions and an EFI partition. Did you install Kubuntu UEFI?


October 21st, 2018, 06:16 AM
hi thanks for the reply.

I delive I am using BIOS not uefi.
Here is the BootInfo Summary Link: http://paste.ubuntu.com/p/WxWkWDKHnZ

October 21st, 2018, 11:39 AM
I am not an expert in reading the Boot-Info script output but it looks to me as though your original Windows 10, and presumably also the Ubuntu you had previously, were both installed using UEFI, though it is now impossible to know anything about the previous Ubuntu system as that has gone, replaced with Kubuntu.

When you overwrote the Ubuntu and installed Kubuntu I assume that was using a USB install medium; did you boot that using the UEFI version or simply go to the first instance of the USB in the boot devices list, because it looks as if Windows 10 is in UEFI, but you are now using Kubuntu, as you thought, in legacy mode.

In theory you might still be able to boot to Windows but you will have to do that from the boot device list, not from grub. Try hitting the key that brings up your boot priority device list and see what is offered. However, for ease of use it may still be easiest if you have npot used it much to reinstall Kubuntu, but this time in UEFI mode. It may also be possible to change the Kubutnu mode to UEFI without reinstalling, but I regret I can not help with those possibilities so wait for more and better advice.

October 21st, 2018, 02:09 PM
/dev/nvme0n1p2 B6D9-E4A6 vfat

The above info was in your original bootinfo script and shows the EFI vfat partition. You GParted image also explicityl shows an EFI partition on the drive. The new boot repair output shows and EFI partition also. Did you notice the messages indicating that you had run boot repair in Legacy mode? You need to run it again in EFI mode (check their home page on how to do this), maybe disable Legacy in the BIOS as running it Legacy doesn't show any of the EFI files nor does it show any Grub files.

October 21st, 2018, 03:16 PM
Also Boot-Repair uses bootinfoscript as first part of report and bootinfoscript has not been updated to fully show the new NVMe drives.

Reboot in UEFI mode and run the full uninstall/reinstall of grub from advanced options. Do not run if in BIOS mode.