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Thread: can't boot to windows 8 after ubuntu 12.04 LTS installation

  1. #1
    Join Date
    Jul 2013
    Beans
    1

    Unhappy can't boot to windows 8 after ubuntu 12.04 LTS installation

    I have a HP Pavilion Touchsmart laptop which came initially with Windows 8 OS. I disabled the secure boot then, installed ubuntu 12.04 LTS on a separate partition (dual boot). Now I cannot boot windows 8. Selecting the windows 8 option the following error is displayed
    Code:
    error: unknown command 'drivemap'
    error: invalid EFI file path.
    I ran the boot-repair once but still the same problem persists.
    Boot-repair: http://paste.ubuntu.com/5890413

  2. #2
    Join Date
    Apr 2012
    Location
    Scotland, UK
    Beans
    150
    Distro
    Lubuntu 13.04 Raring Ringtail

    Re: can't boot to windows 8 after ubuntu 12.04 LTS installation

    It sounds like you've deleted your windows boot partition, sadly.
    The drivemap is so it can load your OS onto memory, if it doesnt exist then you very well may need to re-install windows 8.
    Other people on here more experienced with windows 8 might be able to help.

    Sorry i cant!
    Boab1993

  3. #3
    Join Date
    Jun 2009
    Location
    SW Forida
    Beans
    Hidden!
    Distro
    Ubuntu 16.04 Xenial Xerus

    Re: can't boot to windows 8 after ubuntu 12.04 LTS installation

    If it is Windows 8 that is UEFI. But it sounds like you installed Ubuntu in BIOS/CSM/Legacy mode? UEFI and BIOS write hardware system data differently for system to use so booting from BIOS will not let you boot Windows from grub. Also grub has a bug and writes BIOS boot entries even if Ubuntu is in UEFI mode. You can use Boot-Repair to convert to UEFI or to add correct UEFI Windows boot entries.

    Post the link to the BootInfo report that this creates. Is part of Boot-Repair:
    https://help.ubuntu.com/community/Boot-Info
    Boot Repair -Also handles LVM, GPT, separate /boot and UEFI dual boot.:
    https://help.ubuntu.com/community/Boot-Repair
    You can repair many boot issues with this or 'Create BootInfo' report (Other Options) & post the link it creates, so we can see your exact configuration and diagnose advanced problems.
    LighterWeight (Lubuntu based) Boot-RepairCD
    http://sourceforge.net/projects/boot-repair-cd/files/
    Full Ubuntu 13.04 liveDVD or USB Install with Boot-Repair included (for newer computers)
    https://help.ubuntu.com/community/LinuxSecureRemix
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

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