System boots straight into Windows without showing GRUB

Question

I installed Ubuntu alongside Windows but I did not disable secure boot as someone told me it could cause problems with boot loader. So when installation finished and I rebooted, the system went straight into Windows. I went to Ubuntu IRC Support and they told me to turn off the secure boot and reinstall Ubuntu. I did that but my system still boot into windows.

This is a picture of partitions on my system:

This is my first Ubuntu install on my new laptop.
I followed everdaylinux guide to install it and I used something else option.

score 9 · Answer 1 · edited Feb 04 '18 at 18:32

9

Re-installing GRUB is almost certainly overkill, and carries a small risk of messing things up. Instead, try this:

Boot to Windows.
Open an Administrator Command Prompt window by right-clicking the Command Prompt icon and selecting the option to run it as Administrator.
Type bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi
Reboot.
If you boot into Ubuntu but GRUB did not give you a menu or if that menu did not include Windows, type sudo update-grub in a Terminal.

That should fix it. Alternatively, instead of steps #2-3, you could try the third-party EasyUEFI, which gives you a GUI menu for rearranging EFI boot priorities. Some EFIs provide similar functionality in their setup utilities. You can also do the same thing with efibootmgr in Ubuntu, but that sometimes fails due to bugs in either efibootmgr or EFIs, and it's harder to explain than is the same procedure with bcdedit in Windows.

edited Feb 04 '18 at 18:32

Scott Stensland

15,575

answered Aug 21 '15 at 12:38

Rod Smith

44,284
7
63
105

i did that cmd thing and was successful rebooted and it went straight into windows and then i used super grub 2 to boot into ubuntu and typed sudo update-grub in a Terminal. though still it does not show grub let me try easy bcd – zuzulovesu Aug 22 '15 at 11:55
aslo easy bcd added ubuntu entry in boot but when i select it ... it does not boot – zuzulovesu Aug 22 '15 at 12:01
Please boot into Ubuntu and run the Boot Info Script. This will generate a file called RESULTS.txt. Post that file to a pastebin site and post the URL back here. Also, what make and model computer do you have? – Rod Smith Aug 23 '15 at 16:13
Worked! So much simpler than live boot. – bmilesp Aug 23 '17 at 22:47

score 1 · Answer 2 · edited Aug 21 '15 at 10:40

1

Okay, this is a bit of a process, so fair warning beforehand: it gets a little complex.

You'll have to boot into the Ubuntu LiveCD, and select try Ubuntu.
From there, mount your root partition. You can do this by going into the file manager and then clicking on "20GB Filesystem" (or something very similar to that - you'll know it when you see it on the side).
Now open a terminal and type sudo -i

That will transfer you to a root shell , so be careful!

Run cd /media/ubuntu

then type ls and hit enter.

You should see 1 (maybe 2) options . One will have a very strange name, the other one will have a label denoting as a CDrom.

If there is a second entry , go to the very strange name by typing cd foldername and hitting enter. Then execute

grub-install /dev/sda; chroot . grub-update

The output will be "done." Reboot, and your bootloaded should be back in place with your choice.

edited Aug 21 '15 at 10:40

Ravan

9,379

answered Aug 21 '15 at 04:55

Mark

179

i do not have a cd but i do have a usb from which i installed ubuntu u can see http://paste.ubuntu.com/12139261/ i tried its showing something different – zuzulovesu Aug 21 '15 at 05:27
http://paste.ubuntu.com/12139267/ – zuzulovesu Aug 21 '15 at 05:29
have you tried this – Ravan Aug 21 '15 at 05:37
nope brb let me give this a try https://help.ubuntu.com/community/Boot-Repair – zuzulovesu Aug 21 '15 at 05:43
so i ran boot repair in ubuntu live usb this is what i got http://paste.ubuntu.com/12139346/ – zuzulovesu Aug 21 '15 at 06:11
http://imgur.com/HNIUBWR and http://imgur.com/PeUr66J – zuzulovesu Aug 21 '15 at 06:13
im guessing u guys didn't check comments ? – zuzulovesu Aug 22 '15 at 11:00

score 0 · Answer 3 · answered Aug 21 '15 at 12:32

0

Write the Super Grub disk to a USB drive and boot from it.

Start Ubuntu.

If you are in Ubuntu, open a terminal and type

sudo grub-install /dev/sda

answered Aug 21 '15 at 12:32

fallingcats

498

http://paste.ubuntu.com/12150106/ – zuzulovesu Aug 22 '15 at 11:44
Try sudo update-grub and then the above again. – fallingcats Aug 23 '15 at 22:16

score -2 · Answer 4 · answered May 25 '18 at 12:09

ISSUE --

" I CAN'T ACCESS THE GRUB (UBUNTU) MENU BECAUSE MY LAPTOP/PC BOOTS DIRECTLY TO WINDOWS. "

SOLUTION --

" PRESS THE KEY THAT OPENS YOUR BIOS SETTINGS DURING START. UNDER BOOT CONFIGURATIONS,YOU SEE UEFI BOOT ORDER , CLICK ON /OS BOOT MANAGER/ (ON TOP) , PRESS F5/F6 TO CHANGE THE PRIORITY OF WINDOWS / UBUNTU . KEEP UBUNTU ON TOP.

VOILA! IT'S DONE. :)

System boots straight into Windows without showing GRUB

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