Dual Boot problem: Windows 8/Ubuntu

Asked by luca-mastro on 2012-11-23

I have got a newly bought ASUS N56V with Windows 8 preinstalled. I needed to install Ubuntu so i partitioned the disk and after having disabled the Secure Boot option from Windows 8 i successfully installed Ubuntu 12.10 from a Live USB. The problem is that if i try to access both to Windows 8 (loader) and Windows Recovery System (loader) from the grub menu, these tow errors show: "can't find command 'drivemap' " and "invalid EFI file path" and it goes back to the grub menu. In conclusion I do not have access to my Windows 8 partition but can only use Ubuntu. How can I solve the problem?
Thank you!

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Ubuntu grub2 Edit question
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John Wolf (johnwolf416) said : #1

W8 Boot modified linked to GRUB2 use GUI to build Grub cfg w8 should have a checkbox marked.
Grub Customizer in terminal (Cut & Paste OK)
sudo add-apt-repository ppa:danielrichter2007/grub-customizer
sudo apt-get update
sudo apt-get install grub-customizer

To get back to original W8 boot you will have to create an emergency boot flash . Select DOS prompt
bootrec.exe /fixmbr
bootrec.exe /fixboot
bootrec.exe /RebuildBcd

Thank you John,
Unfortunately, I'm pretty new to the Ubuntu OS, so i've paste and installed the grub customizer but i don't really now how to build Grub cfg. Could you please guide me through? I don't know what changes I need to make.


Thank you very much! everything works fine now!