Ubuntu – Cannot boot into ubuntu 12.10

12.10dual-bootsystem-installationuefiwindows 8

Below given are the steps which I followed to install ubuntu 12.10 with existing windows 8 in my machine.

I downloaded ubuntu 12.10 into my disk and made it bootable from my usb by selecting that iso file.
Then restared my mahine and in BIOS I selected boot from usb.
Went into Linux os and selected install ubuntu alongside windows 8. It asked for memory allocation and I selected 550 GB for Ubuntu and 404GB for Windows. After that it completed ubuntu installation.
The booted into my windows 8 and used easyBCD to add a new entry.
Ubuntu
grup2

Now the easyBCD shows,

There are a total of 4 entries listed in the bootloader.

Default: Windows 8
Timeout: 10 seconds
EasyBCD Boot Device: C:\

Entry #1
Name: Lenovo Recovery System
BCD ID: {e58d0cb6-2eae-11e2-9d20-806e6f6e6963}
Device: \Device\HarddiskVolume3
Bootloader Path: \EFI\Microsoft\Boot\LrsBootMgr.efi

Entry #2
Name: EFI USB Device
BCD ID: {e58d0cb5-2eae-11e2-9d20-806e6f6e6963}
Device: Unknown
Bootloader Path: 

Entry #3
Name: Windows 8
BCD ID: {current}
Drive: C:\
Bootloader Path: \windows\system32\winload.efi

Entry #4
Name: Ubuntu 12.10
BCD ID: {6f173570-3bce-11e2-be74-c0143dd589c0}
Drive: C:\
Bootloader Path: \NST\AutoNeoGrub0.mbr

Next I restarted my system and in the boot options it shows windows 8 and ubuntu 12.10

When I click on ubuntu it displays,

\NST\AutoNeoGrub0.mbr
status 0xc000007b
The application or operating system cold not be loaded because a required file is    missing or contains errors.

I am able to see C:\NST\AutoNeoGrub0.mbr Not sure why it shows file not present

Can you help me resolve this…

Thanks 🙂

Best Answer

I installed Windows 8 alongside Ubuntu with no dual-boot problems. In your case I would try this:

Boot into Live Ubuntu, using a USB pen or CD.
Open a terminal and type:
sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update && sudo apt-get install -y boot-repair && boot-repair
If you are not secure of what you are doing, just press Recommended repair button.
If you know what you are doing click advanced options and configure the Grub installation as you will.

Using EasyBCD to Boot to GRUB from Windows Boot Menu

Start Windows and install the free version of EasyBCD.
Open the EasyBCD program and select Add New Entry from the sidebar on the left.
Select the rightmost tab, NeoGrub, under "Operating Systems" and click the Install button.

Note: This adds the NeoGrub bootloader code to your C:\ folder. If the install worked correctly you will see the file C:\NeoGrub and the folder C:\NST.
Select the Linux/BSD tab. Choose GRUB2 as the type of the entry and, optionally, edit the name of the entry you are about to add to the Windows Boot menu.

Click the Add Entry button to add an entry to boot Linux (GRUB menu) to the Windows boot menu.
Select Edit Boot Menu from the sidebar to review your changes.

Note: You can delete the entry for NeoGrub Bootloader if you wish.
You need the bootloader, but you do not need a boot menu entry for it unless you are using it in some other way.
Save your changes and reboot. When the Windows boot menu appears, select the EasyBCD entry you added to boot Linux. You should see something similar to the text below.

Then the GNU GRUB boot menu should appear.

Ubuntu – Dual-boot Ubuntu 12.10 on UEFI along Windows 8 (GRUB – error: can’t find command drivemap)

I found a temporary solution.

Add a custom entry to GRUB bootmenu

Append the code below to /etc/grub.d/40_custom.

menuentry "Windows 8" {
    insmod part_gpt
    insmod chain
    set root='(hd0,gpt1)'
    chainloader /EFI/microsoft/BOOT/bootmgfw.efi
}

You can use Ctrl+Alt+T to open a terminal and run sudo nano /etc/grub.d/40_custom, then copy and paste the code. Finally then press Ctrl+O to save and Ctrl+X to leave.

Heads up: hd0,gpt1 here is the ID of my EFI System Partition (ESP). If your ESP is not the first partition on your first harddrive during boot, then yours is different! E.g. hd1,gpt2 for the second partition on the second drive.

Replace part_gpt with part_msdos if the drive uses MBR and legacy partitioning and also change hd0,gpt1 to hd0,msdos1 respectively.

Apply changes to GRUB

Simply run the following command, which should generate a new GRUB configuration, including the new custom entry:

sudo update-grub

Now reboot, you should be able to boot Windows 8 now. If not, and Windows complains about corrupted BCD configuration, then continue on superuser: How can I repair the Windows 8 EFI Bootloader?

Warning: On some occasions, if you boot Windows 8, GRUB will be replaced by Windows Boot Manager as default boot manager.

Best Answer

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