Re: [Xen-devel] Fedora 30 DomU - pygrub always boots the second menu option

[Steven Haigh <netwiz@xxxxxxxxx>]

Further looking into this, it seems the problem occurs on this section 
of the grub.cfg:
### BEGIN /etc/grub.d/08_fallback_counting ###
insmod increment
# Check if boot_counter exists and boot_success=0 to activate this 
behaviour.
if [ -n "${boot_counter}" -a "${boot_success}" = "0" ]; then
 # if countdown has ended, choose to boot rollback deployment,
 # i.e. default=1 on OSTree-based systems.
 if [ "${boot_counter}" = "0" -o "${boot_counter}" = "-1" ]; then
   set default=1
   set boot_counter=-1
 # otherwise decrement boot_counter
 else
   decrement boot_counter
 fi
 save_env boot_counter
fi
### END /etc/grub.d/08_fallback_counting ###

It seems pygrub sees the 'set default=1' and uses it - even though it 
shouldn't be normally hit due to it being in a conditional.
Steven Haigh

📧 netwiz@xxxxxxxxx     💻 https://www.crc.id.au
📞 +613 9001 6090       📱 +614 1293 5897


On Thu, Aug 1, 2019 at 12:54 AM, Steven Haigh <netwiz@xxxxxxxxx> wrote:
> There's a ton of changes to grub in Fedora 30.... Most of them 
> causing pain.
> When booting using pygrub, the presented menu always has the second 
> option selected.
> The contents of /etc/default/grub is as follows:
> GRUB_TIMEOUT=1
> GRUB_DEFAULT=0
> GRUB_DISABLE_SUBMENU=true
> GRUB_TERMINAL_OUTPUT="console"
> GRUB_CMDLINE_LINUX="audit=0 selinux=0 console=hvc0"
> GRUB_DISABLE_RECOVERY="true"
> GRUB_ENABLE_BLSCFG=false
>
> I have attached the generated grub.cfg created via:
>         grub2-mkconfig -o /boot/grub/grub.cfg
>
> BLSCFG is a whole new clusterf**k of problems that became default in 
> Fedora 30 that cause many problems - but first things first...
> Steven Haigh
>
> 📧 netwiz@xxxxxxxxx     💻 https://www.crc.id.au
> 📞 +613 9001 6090       📱 +614 1293 5897
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxxx
> https://lists.xenproject.org/mailman/listinfo/xen-devel


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