Grub recovery after windows 10 has changed the boot

[Terry Polzin]

Forced to work from home these past months, I have been booting my laptop
into windows rather than Fedora 32.

I have typically let the machine suspend and now after repeated
suspensions it appears that GRUB has been overwritten there is no menu and
the laptop boots straight into windows 10.

How do I get grub back?

[Jonathan Billings]

On Wed, Mar 03, 2021 at 01:43:08PM -0500, Terry Polzin wrote:
>  Forced to work from home these past months, I have been booting my laptop
>  into windows rather than Fedora 32.
>  
>  I have typically let the machine suspend and now after repeated
>  suspensions it appears that GRUB has been overwritten there is no menu and
>  the laptop boots straight into windows 10.
>  
>  How do I get grub back? 
Is it possible that your windows install has Fast Startup enabled?

Also, are you booting via UEFI or the legacy boot/csm (a.k.a. BIOS
boot)? 

-- 
Jonathan Billings <billings(a)negate.org&gt;

[Terry Polzin]

UG UEFI boot. Fast startup?  I'm forced to use windows for work.  Even
though I am a LINUX admin.  What I know about windows internals you can fit
into a thimble.



On Wed, Mar 3, 2021 at 1:54 PM Jonathan Billings <billings(a)negate.org&gt;
wrote:

>  On Wed, Mar 03, 2021 at 01:43:08PM -0500, Terry Polzin wrote:
>  >
>  > Forced to work from home these past months, I have been booting my laptop
>  > into windows rather than Fedora 32.
>  >
>  > I have typically let the machine suspend and now after repeated
>  > suspensions it appears that GRUB has been overwritten there is no menu
>  and
>  > the laptop boots straight into windows 10.
>  >
>  > How do I get grub back?
>
>  Is it possible that your windows install has Fast Startup enabled?
>
>  Also, are you booting via UEFI or the legacy boot/csm (a.k.a. BIOS
>  boot)?
>
>  --
>  Jonathan Billings <billings(a)negate.org&gt;
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[Jonathan Billings]

On Wed, Mar 03, 2021 at 02:06:25PM -0500, Terry Polzin wrote:
>  UG UEFI boot. Fast startup?  I'm forced to use windows for work.  Even
>  though I am a LINUX admin.  What I know about windows internals you can fit
>  into a thimble. 
I am also a Linux admin, although I am adept enough with Google to
guess that these instructions might help:

https://www.windowscentral.com/how-disable-windows-10-fast-startup

Basically, with Fast Startup enabled, windows never really shuts down
but goes into hibernation, so next time you "power up" it is just
waking up.  So, you never get a chance to see the GRUB menu.

If fast startup isn't set, then you probably will need to boot off
rescue linux media and fix the boot order with `efibootmgr`.

-- 
Jonathan Billings <billings(a)negate.org&gt;

[Derek Cramer]

If Windows has indeed hijacked the boot loader, you can fix it from the
Windows command prompt with the following:

bcdedit /set {bootmgr} path \EFI\fedora\grubx64.efi

Obviously this assumes you have local admin rights on Windows.

Regards,
Derek


On Wed, 3 Mar 2021 at 20:55, Jonathan Billings <billings(a)negate.org&gt; wrote:

>  On Wed, Mar 03, 2021 at 02:06:25PM -0500, Terry Polzin wrote:
>  >
>  > UG UEFI boot. Fast startup?  I'm forced to use windows for work.  Even
>  > though I am a LINUX admin.  What I know about windows internals you can
>  fit
>  > into a thimble.
>
>  I am also a Linux admin, although I am adept enough with Google to
>  guess that these instructions might help:
>
>  https://www.windowscentral.com/how-disable-windows-10-fast-startup
>
>  Basically, with Fast Startup enabled, windows never really shuts down
>  but goes into hibernation, so next time you "power up" it is just
>  waking up.  So, you never get a chance to see the GRUB menu.
>
>  If fast startup isn't set, then you probably will need to boot off
>  rescue linux media and fix the boot order with `efibootmgr`.
>
>  --
>  Jonathan Billings <billings(a)negate.org&gt;
>  _______________________________________________
>  users mailing list -- users(a)lists.fedoraproject.org
>  To unsubscribe send an email to users-leave(a)lists.fedoraproject.org
>  Fedora Code of Conduct:
>  https://docs.fedoraproject.org/en-US/project/code-of-conduct/
>  List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
>  List Archives:
>  https://lists.fedoraproject.org/archives/list/[e-mail]
>  Do not reply to spam on the list, report it:
>  https://pagure.io/fedora-infrastructure
>

[Terry Polzin]

Derek,

That did the trick.

Thanks


On Thu, Mar 4, 2021 at 4:42 PM Derek Cramer <cramerd(a)gmail.com&gt; wrote:

>  If Windows has indeed hijacked the boot loader, you can fix it from
> the
>  Windows command prompt with the following:
>
>  bcdedit /set {bootmgr} path \EFI\fedora\grubx64.efi
>
>  Obviously this assumes you have local admin rights on Windows.
>
>  Regards,
>  Derek
>
>
>  On Wed, 3 Mar 2021 at 20:55, Jonathan Billings <billings(a)negate.org&gt;
>  wrote:
>
> > On Wed, Mar 03, 2021 at 02:06:25PM -0500, Terry Polzin wrote:
> > >
> > > UG UEFI boot. Fast startup?  I'm forced to use windows for work.  Even
> > > though I am a LINUX admin.  What I know about windows internals you can
> > fit
> > > into a thimble.
> >
> > I am also a Linux admin, although I am adept enough with Google to
> > guess that these instructions might help:
> >
> > https://www.windowscentral.com/how-disable-windows-10-fast-startup
> >
> > Basically, with Fast Startup enabled, windows never really shuts down
> > but goes into hibernation, so next time you "power up" it is just
> > waking up.  So, you never get a chance to see the GRUB menu.
> >
> > If fast startup isn't set, then you probably will need to boot off
> > rescue linux media and fix the boot order with `efibootmgr`.
> >
> > --
> > Jonathan Billings <billings(a)negate.org&gt;
> > _______________________________________________
> > users mailing list -- users(a)lists.fedoraproject.org
> > To unsubscribe send an email to users-leave(a)lists.fedoraproject.org
> > Fedora Code of Conduct:
> > https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
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> >
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>