Ubuntu: “invalid EFI file path” while booting Windows [closed]


I just got my new working notebook with Windows 8 pre-installed. After installing Ubuntu 12.10 the grub menu says that there is an "invalid EFI file path" and it won't boot Windows. Ubuntu works fine...

Is there anything I can do about this?


you should try to add windows as workaround manually to grub.

At first run

sudo blkid  

Here you should see the UUID from your windows partition

open /etc/grub.d/40_custom and paste/edit following code but replace UUID_FROM_WIN8 with your UUID mentioned above.

menuentry "Windows 8 UEFI" {      search --fs-uuid --no-floppy --set=root UUID_FROM_WIN8      chainloader (${root})/efi/Microsoft/Boot/bootmgfw.efi  }  

The chainloader should look the same for all windows versions, as far as i know..

After editing grub files you have to run

sudo update-grub  

Please test it first and give me some feedback because it could be possible that the efi file won't be found.. but i don't want to give multiple advice in one answer..

hope this helps!


From the grub.cfg you posted it looks like you've done a lot of messing with grub to try to get this working, I recommend that you start by cleaning all of this up and going back to a default grub configuration (which will probably have no entry for Windows at all in the grub.cfg) and then create a file /boot/grub/custom.cfg with this for contents:

#This entry should work for any version of Windows installed for UEFI booting    menuentry "Windows (UEFI)" {   search --set=root --file /EFI/Microsoft/Boot/bootmgfw.efi   chainloader /EFI/Microsoft/Boot/bootmgfw.efi  }  

In the long term, hopefully os-prober and grub-mkconfig will gain support for detecting UEFI based Windows installations (at which point this entry will become redundant, and you can simply delete /boot/grub/custom.cfg)


Boot Repair solved it for me.

Go to your boot options (F12 or etc) and boot your liveCD or liveUSB. Make sure that you boot in UEFI (Ex. "UEFI: CD/DVD" or "UEFI: [USBname]"). Select "Try Ubuntu." Get Boot Repair and select "recommended repair."

Link: Ubuntu Boot Repair

Note: Make sure that you boot the CD or USB in UEFI. I ran Boot Repair without being in UEFI mode and I got Grub, but Windows 8 would not boot.

Hope this helps!

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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