disabling secure boot

maranna said:

>> different boards??

Hi,
Different versions or series like z170-z270-z370
I believe yours is coffee lake ?

sygnus21 said:

I'll ask the same of you... please read carefully what I wrote.
And for the record, NO, secure boot DOES NOT disable Secure Boot (by itself). But if enabled, it will NOT allow Secure Boot. Been there, done that, wrote a post on it. I'm currently busy so I cant find the link right now, but reading the link I posted may help clear your confusion.
Thanks.

Hi,

ThrashZone said:

Hi,
Fact is both my asus boards were
Secure boot enabled
CSM enable
OS type uefi compatibility.

The last had issues with some ms updates later on which switching os type to other os cured that.

No telling if coffee lake.... bios settings are different.
I only have haswell-e and skylake-x.

Gigabyte (works the same on 4 of my 5 boards. This is m Z390 board....

CSM Disabled - Secure Boot On


CSM Enabled - Secure Boot Off


Secure Boot Setting (Can't be accessed with CSM Enabled)


Works the same on my Gigabyte Z390, Z270, and Z170 boards. I believe it also works the same on my Z87 board as well. The reason I'm familiar with this subject is cause there was an issue with AMD (and specifically Sapphire) R9 Fury (X) cards which a BIOS issue preventing secure boot. Sapphire had to issue a new BIOS to solve it. If, (and when) I find my posts at the AMD forums, I'll link it.

Peace:)

Hi,
Board manufactures tend to differ

ThrashZone said:

Hi,
Board manufactures tend to differ

Yeah, but you told me I was wrong

Anyway here's my link on my issue - Fiji Bios Editing ( Fury / Fury X / Nano / Radeon Pro Duo ) - Page 86 - Overclock.net - An Overclocking Community

Basically if I disabled CSM, I would get no video output and would have to clear the CMOS and enable CSM for the card to work again. This also affected the ability to allow the PC to use Secure Boot. It basically had something to do with the UEFI setting on the card. Sapphire eventually sent me a BIOS to fix the issue.

And that's how I'm familiar with this topic. Peace

Hi,
Wrong for an asus board which the op has by the way

Personally I wouldn't of thought even switching os type would of matter unless it was set to boot uefi only or something.

Some Asus boards work the same way as reported elsewhere. Anyway as I said, and stand by my statement, secure boot should not be enabled by default. And there is a clear easy way to check (in Windows, I know nothing about Linux) if one chooses to do so.

Movin on...

sygnus21 said:

Some Asus boards work the same way as reported elsewhere. Anyway as I said, and stand by my statement, secure boot should not be enabled by default. And there is a clear easy way to check (in Windows, I know nothing about Linux) if one chooses to do so.

Movin on...

>>I check in both system information and under security>device.

I did find the way to disable secure boot with Asus z390. Use mode > 'other' instead of the default UEFI.
You find this under boot > secure boot.