Re: Have one of 5 machines that no longer autoboots??

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On Wed, 30 Mar 2022 00:59:54 +1000
"Michael D. Setzer II via users" <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

> Machine that doesn't timeout boot, before it has a similar 
> saved_entry, but tried resetting it to 0 to boot from 1st 
> one.
> 
> grub2-editenv list
> saved_entry=0
> boot_success=1
> boot_indeterminate=0
> 
> This notebook that works fine
> grub2-editenv list 
> saved_entry=189711f94e78436d9618b891a8fce70e-5.16.
> 17-100.fc34.x86_64
> boot_success=1
> boot_indeterminate=0

I haven't had to examine grub for a long time.  So, I'm not familiar
enough with it to say what is incorrect.  What do the successful and
failing system have in
/etc/default/grub ?
I think if you put the line
GRUB_DEFAULT=saved
in that file on the failing machine, and then run
grub2-mkconfig -o grub.cfg 
on the failing machine in the directory where the grub.cfg is,
it will start booting properly again.  The location of grub.cfg
*should* be in /boot/grub2/ unless the machines are booting EFI.  Then
the grub.cfg will be in /boot/efi/EFI/fedora.  This has changed since
f34 so that grub.cfg is *always* in /boot/grub2/ now.

If you install / have installed pinfo, you can get lots of information
about grub by running
pinfo grub2
Arrow keys will move around, space will move to links.
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