How to boot into Ubuntu or Windows

Question

I have installed Ubuntu 14.04 (Trusty Tahr) along with Windows 8.1. When I turn on the computer I don't get an option to boot into Ubuntu, and I go strait into Windows. How can I solve this?

I have tried using boot-repair, but I could not install it on live Ubuntu (as the Internet connection is not working), so it is working in my 'installed' version of Ubuntu. There I am not able to use the 'recommended repair' option.

Here is my pastebin link: http://paste.ubuntu.com/15306542/

Looks like you simply have to install the GRUB boot loader to `/dev/sda`. Probably you selected something else in the installer (probably `/dev/sda7`). — Byte Commander, Mar 06 '16 at 12:51
Possible duplicate of [How can I repair grub? (How to get Ubuntu back after installing Windows?)](http://askubuntu.com/questions/88384/how-can-i-repair-grub-how-to-get-ubuntu-back-after-installing-windows) — Byte Commander, Mar 06 '16 at 12:53
You have an HP, which violates UEFI spec and uses description to boot. You need to create /EFI/Boot/bootx64.efi that really is shimx64.efi and boot hard drive or fallback entry in UEFI. http://askubuntu.com/questions/486752/dual-boot-win-8-ubuntu-loads-only-win/486789#486789 and: https://askubuntu.com/questions/597052/can-not-boot-anymore-after-a-boot-repair — oldfred, Mar 06 '16 at 16:02
Possible duplicate of [Dual boot Win 8 / Ubuntu loads only Win](https://askubuntu.com/questions/486752/dual-boot-win-8-ubuntu-loads-only-win) — karel, Jul 16 '19 at 12:06

score 0 · Answer 1 · edited Nov 16 '20 at 14:31

Disable hibernation and fast startup in Windows.
- Open command prompt as administrator and execute:
```
powercfg /h off  
```
- Open Windows Control Panel.
- Go to Power Settings.
- Uncheck Fast startup.
Shutdown the machine completely - do NOT reboot.
Reinstall GRUB boot loader for Ubuntu in EFI mode.
- Boot from the Ubuntu installation medium.
- Select Try Ubuntu without installing.
- Open a terminal and execute:
```
sudo mount /dev/sda7 /mnt
sudo mount /dev/sda2 /mnt/boot/efi
for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done
sudo chroot /mnt
grub-install /dev/sda
update-grub  
```
Note:

sda = disk | sda2 = EFI partition | sda7 = system partition
Boot into BIOS and select Ubuntu as default system.

How to boot into Ubuntu or Windows

1 Answers1