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Thread: Dell XPS 13 Haswell built-in display problem with Ubuntu 13.10

  1. #31
    Join Date
    Feb 2014
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    Re: Dell XPS 13 Haswell built-in display problem with Ubuntu 13.10

    Quote Originally Posted by oldfred View Post
    Your Ubuntu install has been converted to UEFI so the grub in the MBR will not work in BIOS boot mode.
    But in UEFI you should have a choice to boot the ubuntu entry.

    You do not have the secure boot version installed, so you must have secure boot off to see the ubuntu entry in uEFI as with secure boot on, only secure boot systems are shown.

    In UEFI I don't have any choices, Windows loads automatically, even when secure boot is off !

    Perhaps it's a problem with the MBR / Windows Boot Manager ?

  2. #32
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
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    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Dell XPS 13 Haswell built-in display problem with Ubuntu 13.10

    Post this:
    # from live CD and use efibootmgr
    sudo efibootmgr -v


    http://linux.dell.com/cgi-bin/gitweb...README;hb=HEAD
    http://software.intel.com/en-us/arti...and-scripting/
    Launch EFI Shell from File System Device
    https://wiki.archlinux.org/index.php...ace#UEFI_Shell
    change label
    http://askubuntu.com/questions/38316...ing-efibootmgr

    And you may have to do this:

    UEFI NVRAM boot entries are cached in the BCD store
    BCD has 1:1 mappings for some UEFI global variables
    Any time {fwbootmgr} is manipulated, NVRAM is automatically updated

    Alternative to Boot-Repairs rename of shim.
    Some systems work better to register grub/shim from inside Windows - for those that keep resetting Windows as default
    http://askubuntu.com/questions/37155...3-10-dual-boot
    bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi
    https://coderwall.com/p/vfyqkg
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  3. #33
    Join Date
    Feb 2014
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    Re: Dell XPS 13 Haswell built-in display problem with Ubuntu 13.10

    Thank you very much !

    I used BCDedit and changed the path to grubx64.efi. Everything worked fine, but not in secure boot mode, so I changed grubx64.efi to shimx64.efi and now Windows does not boot anymore (the Grub menu appears but when I choose Windows it writes "invalid EFI path").

  4. #34
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
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    Ubuntu 14.04 Trusty Tahr

    Re: Dell XPS 13 Haswell built-in display problem with Ubuntu 13.10

    Can you boot Windows from UEFI menu?

    Did you also run Boot-Repair and its buggy UEFI rename. That usually is not required for Dells and then you can only boot Windows with Boot-Repairs entry to boot the renamed Windows efi file.

    Grub2's os-prober in 13.10 should create correct chain load to Windows efi file entries. Older versions of grub did not and only Boot-Repairs version would work.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  5. #35
    Join Date
    Feb 2014
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    Re: Dell XPS 13 Haswell built-in display problem with Ubuntu 13.10

    Ok, since I used os-prober I can boot Windows but only in UEFI when the secure boot is off (Ubuntu is always working good).

    Any idea to make Windows working also in secure boot ?


    Thank you very mych for your help !

  6. #36
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
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    Ubuntu 14.04 Trusty Tahr

    Re: Dell XPS 13 Haswell built-in display problem with Ubuntu 13.10

    I am a bit surprised that Windows will boot with secure boot off, but not with it on.
    Is it not nice that Microsoft sets up this complicated secure boot feature and then cannot use it itself.

    http://www.zdnet.com/torvalds-clarif...on-7000011918/
    the whole UEFI thing is more about control than security
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







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