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Thread: G75 BIOS 221: can UEFI secure boot be disabled/enabled?

  1. #1
    ROG Enthusiast timppu +20
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    G75 BIOS 221: can UEFI secure boot be disabled/enabled?

    I've tried to search for the answer in this forum but didn't seem to get any conclusive answer.

    I noticed that with the newest G75 BIOS 221, there is no option to disable and enable UEFI (secure) boot. Is this option somewhere else, or has he ability to disable it been removed altogether in this newest version?

    I hope it is not removed, because I specifically wanted a future-proof PC where I can in the future replace the aging Windows installation with some Linux distro or some other third-party open OS that might or might not require disabling Microsoft's UEFI secure boot lock-in. I hope ASUS have enough sense to retain the option to disable that lock, if the user so wishes.

  2. #2
    ROG Guru: Black Belt rewben +150 rewben +150
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    @timppu, there is (to be exact, here). the secure boot thing is optional.

    edit: well, please keep all related information in one post. that way we could have a clearer picture on what you wanna achieve.
    Last edited by rewben; 12-01-2012 at 05:27 AM.

  3. #3
    ROG Enthusiast timppu +20
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    Quote Originally Posted by rewben View Post
    @timppu, there is (to be exact, here). the secure boot thing is optional.
    Thanks, I actually read the second message/discussion before, but I couldn't really make heads or tails about it. I didn't recall seeing any "Launch CSM" option, but maybe I need to check again.

    So do I get it right now that "Launch CSM" + "Secure Boot Control = Disabled" together are the same as the earlier "UEFI boot = Disabled"?

    Quote Originally Posted by rewben View Post
    edit: well, please keep all related information in one post. that way we could have a clearer picture on what you wanna achieve.
    I felt they were two different objectives, that's why I felt it is better to ask them separately, to know to which issue I'm being getting feedback.

    That other message was that I want to know how to install Win8 Pro into a GPT disk (is this somehow related to UEFI secure boot too?). I prefer to do this with UEFI secure boot.

    This other question was about whether in the distant future I will be able to switch off UEFI secure boot, in order to install any PC OS of my choice (some Linux distro or whatever) to this PC, even if they don't support UEFI secure boot. I just want to make sure that G75 still has, and will have, the option to disable UEFI secure boot. The Linux community seems to be a bit worried that some OEM vendors start offering x86 PCs where there is no such option, effectively blocking development of new alternative OSes for PC.

  4. #4
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    When I first installed the new 221 BIOS. The disable UEFI boot was not there. But it is there really, just a diff. method to disable it.


    Go to the boot options and make sure to delete the UEFI Boot

    Here is how my BIOS boot screen looks after I have deleted it.


  5. #5
    ROG Enthusiast timppu +20
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    Quote Originally Posted by rewben View Post
    @timppu, there is (to be exact, here). the secure boot thing is optional.
    I looked again to G75 BIOS, and frankly I just can't find the options mentioned in those instructions.

    The instructions say that I should enable "Launch CSM" (whatever that is) under Boot. But under Boot in BIOS setup, all I can see is:

    Boot Configuration
    Launch PXE OpROM (Enabled/Disabled)

    Driver Option Priorities

    Boot Option Priorities
    Boot Option #1
    Boot Option #2

    CD/DVD ROM Drive BBS Priorities
    Add New Boot Option
    Delete Boot Option


    I see nothing related to "CSM" anywhere under Boot.


    Also, under Security tab, I don't see anything related to "Secure Boot Control". The only options I see there are:

    Administrator Password
    User Password
    Set Master Password
    I/O Interface Security

    My BIOS is version 221 from this page:

    http://rog.asus.com/notebook/17-inch/g75vw/

    => Download tab => Operating System Windows 7 64bit => BIOS.

  6. #6
    ROG Enthusiast timppu +20
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    Quote Originally Posted by Fire View Post
    When I first installed the new 221 BIOS. The disable UEFI boot was not there. But it is there really, just a diff. method to disable it.

    Go to the boot options and make sure to delete the UEFI Boot
    I don't see any "UEFI Boot" under the boot options (I presume you mean under "Delete Boot Option"?).

    So does that mean that currently UEFI secure boot is already disabled on my BIOS? If that is the case, the obvious next question is: how do I enable it back?

    I really wish they would have simply kept the "UEFI boot: Enabled/Disabled" option, at least that was quite clear.

  7. #7
    ROG Guru: Black Belt rewben +150 rewben +150
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    it's a weird case. maybe the users that have a g75vw with bios 221 can help clear things up a bit :/

    edit: have you gone into the "I/O Interface Security" to have a look?
    Last edited by rewben; 12-01-2012 at 01:52 PM.

  8. #8
    Administrator Pitcher@asus +10
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    hi, if your OS (WIn7 preload, WIn7 update to WIn8) have not this item, but WIn8 preload have it.

  9. #9
    ROG Guru: Black Belt rewben +150 rewben +150
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    sweet; thanks, Mike

  10. #10
    ROG Enthusiast timppu +20
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    Quote Originally Posted by Mike_Lu@ASUS View Post
    hi, if your OS (WIn7 preload, WIn7 update to WIn8) have not this item, but WIn8 preload have it.
    Hi, was the reply to me? Does "this item" refer to UEFI secure boot, ie. it is not present in this model of G75VW?

    Ok then, but frankly I do remember seeing some item related to UEFI (something like: UEFI boot enable/disable) in the original (207) BIOS that was on this machine originally, but it disappeared when I upgraded the BIOS to 221.

    Anyway, if this model is not supposed to have UEFI secure boot but the old kind of non-UEFI BIOS, I guess that's that then. At least I'll be able to install Linux on this too then without any problems.

    I sent a query about this also to ASUS support yesterday or two days ago, but I haven't received any feedback yet.

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