In my menu entry I have also tried to change Here it drops to the mountroot> prompt where " ? = list valid disk boot devices". }Boot process moves along fine until it gets to mounting root (/). There are slim chances that they won’t and in that case, you would have to install a fresh copy of Ubuntu all over again.įor more queries or issues regarding Ubuntu and GRUB2, let me know in the comments below.Search -no-floppy -fs-uuid -015e657c-etc. Restart your system and now you should see the GRUB boot menu which will let you boot to Ubuntu. If you get a prompt saying secure boot is enabled, click on Continue and head over to the BIOS settings and disable secure boot. However, it’s recommended to go with “Recommended Repair” as it mostly solves the problem. This will provide you more drilled down controls. If you have dealt with GRUB before and you have an in-depth idea of the Ubuntu file system, you can also select “Advanced Options”. Click on “Recommended Repair” and it will handle all the complexities. Post that, you will be presented with 2 options. The Boot Repair tool will now automatically scan all the disks in your system to find the ext4 partition.
Now, we can download the repair tool using the following command sudo apt-get install -y boot-repairĪfter downloading the tool, run it using the following command.
The command will add the Boot Repair tool’s repository to apt and also update all the repositories. sudo apt-add-repository ppa:yannubuntu/boot-repair & sudo apt-get update Once you boot into live Ubuntu, open the command line, and type the following command. Plugin the bootable USB media or live CD, restart your system and select “Try Ubuntu without installing”.
You can download the Ubuntu ISO image from the official website and then use a Bootable USB Software to flash the image on the USB. Now, since you cannot boot into Ubuntu, we would need a bootable USB drive or Ubuntu live CD. In that scenario, we would need to repair the file using a tool called Boot Repair. If the first solution didn’t fix your problem, a possible reason may be that you have a broken GRUB file.
In Acer, you need to set the Supervisor password in order to disable Secure Boot. I am using an Acer E5-575G laptop, so my firmware settings would be different from yours. In the firmware settings, disable secure boot. To get to the firmware settings, press F2 or F10 on the boot splash screen.
Now, reboot your system and most probably, you will get the violet GRUB menu.īut, in case you get a “System Bootloader not found” error message, we would need to disable secure boot through the UEFI firmware. This would change the bootloader back to GRUB. To do that, open the command line with administrator privileges and run the following command. In order to enable booting to Ubuntu, we would need to make changes in the Windows boot registry. This is because the Windows bootloader cannot identify Ubuntu. So, now when you restart your system, it directly boots up to Windows 10. Post-Windows update, Microsoft overrides the Windows Boot Manager to use the NT bootloader.