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I edited the grub file to include "pci=noacpi". Then each time I choose to enter Ubuntu (which is installed alongside with Win 10), it is just purple screen, refusing to enter Ubuntu.

I'm wondering if I can edit the grub file in Win 10 to remove the "pci=noacpi". I don't have the terminal in Win 10 to type "gedit/etc/default/grub"

Tony B
  • 103

1 Answers1

2

You can't do it in Windows.

  • If you get the grub

    1. Go to "Advanced Options" and then "Recovery Mode".
    2. Go to "Drop to root shell prompt" (terminal).
    3. nano /etc/default/grub and edit.
    4. update-grub
    5. reboot and you are done.

  • Otherwise

  • Repair restore and reinstall grub 2 with a Ubuntu installation USB or DVD.

Boot from Ubuntu installation DVD or USB drive and choose 'Try Ubuntu without installing'. Mount the partition of your Ubuntu Installation. If you are not sure which one, launch GParted (included in the Ubuntu installation DVD or USB) or. Open a terminal (Ctrl+Alt+T) and use the following command:

sudo fdisk -l

and find out. It is usually a EXT4 Partition. Replace the XX with the drive letter, and partition number, for example: sudo mount /dev/sda1 /mnt.

sudo mount /dev/sdXX /mnt

XX being the partition where Ubuntu is installed.

If there is a separate boot partition.

sudo mount /dev/sdXY /mnt

XY being your boot partition.

for efi boot.

sudo mount /dev/sdXZ /mnt/boot/efi

sdXZ being the efi partition.

Now bind the directories that grub needs access to to detect other operating systems, like so.

sudo mount --bind /dev /mnt/dev &&
sudo mount --bind /dev/pts /mnt/dev/pts &&
sudo mount --bind /proc /mnt/proc &&
sudo mount --bind /sys /mnt/sys

then

sudo gedit /mnt/etc/default/grub

edit it save and go to that using chroot.

sudo chroot /mnt

Now update grub.

update-grub

Now grub is back, all that is left is to exit the chrooted system and unmount everything.

exit &&
sudo umount /mnt/sys &&
sudo umount /mnt/proc &&
sudo umount /mnt/dev/pts &&
sudo umount /mnt/dev &&
sudo umount /mnt

Shut down and turn your computer back on, and you will be met with the default Grub2 screen. Modified from this.

Vijay
  • 8,056
  • It seemed like you were having some difficulty with the formatting, so I stepped in and fixed it. I think I got everything in the right place, but you might want to check. – wjandrea Nov 24 '18 at 00:19
  • @wjandrea Thanks for the effort. I was distracted. – Vijay Nov 24 '18 at 06:20
  • I used the first method and made it. Thanks. One more thing is that I have two options in the "Recovery Mode": Linux 4.18.0-11 and 4.18.0-10. Why did I have two? I just chose the 11 one. – Tony B Nov 25 '18 at 22:47
  • Because you have two kernels. If you fail in one you can use the other. – Vijay Nov 26 '18 at 05:53