Re: [gentoo-user] sysrescue+new asus mobo+secure boot=0

[Mike Kaliman]

I have an Asus TUF Gaming X570 and have the secure boot OS type as "Other
OS". I've been using rEFInd to dual boot with Windows.

On Tue, May 11, 2021, 6:49 PM <thelma@×××××××××××.com> wrote:

> On 5/11/21 4:08 PM, John Blinka wrote:
> > Hello, Gentooers,
> >
> > I just acquired a new Asus board (b560m tuf gaming+wifi) to replace a
> failed gigabyte board on my main Gentoo machine.  Assembly went well, it
> powered up flawlessly first time, it recognized all the hardware... and
> then nothing.   Cannot get it to boot.
> >
> > On all my other machines, there’s a bios setting that allows me to turn
> off secure boot, which allows me to boot Sysrescue from usb, or Gentoo from
> a hard drive.
> >
> > Not so (as far as I can tell) on this mobo/bios.  There’s the usual bios
> boot menu and a secure boot submenu.  However, the secure boot submenu only
> allows me to select between Windows UEFI (with, presumably, secure boot
> enabled) and “other OS”.  I have no clue what “other OS” implies about
> secure boot.  It also offers the ability to accept the standard
> Microsoft-supplied secure boot keys, or to change or delete them.  There
> are a few claims on the web that clearing the PK key (and only that key) or
> clearing all of the keys is the way to turn off secure boot.   I’ve tried
> all the combinations; none of them allow me to boot.
> >
> > The farthest I’ve gotten is to display the Sysrescue usb boot choices.
> Selecting any of them seems to (briefly, for a second) start a boot and
> then the screen goes blank.  Nothing after that.
> >
> > I haven’t found any mention on the web that Asus boards are particularly
> linux hostile, nor much discussion implying that turning off secure boot is
> particularly tricky.  Most of what I’ve seen is, say, Ubuntu oriented.  I
> gather that they have gone through the process of getting their secure boot
> keys authorized by Microsoft.
> >
> > Anybody have success getting Gentoo to boot from a recent Asus mobo?
> >
> > Thanks!
> >
> > John Blinka
>
> Try to  watch this clip it might help.
>
>
> https://www.google.com/search?sxsrf=ALeKk039uHXT9NuDloVx1Rvp0Mw3kBzEXg:1620773038736&q=asus+board+%22b560m%22+turn+off+secure+boot&sa=X&ved=2ahUKEwjSsfCJ2sLwAhXCpJ4KHdr6Bz4Q5t4CMAx6BAgeEA0&biw=1263&bih=660#kpvalbx=_ygibYJexK87E-gT-gLaYDw55
>
>