[SOLVED] Fedora 20

terry-duell · 06-12-2014, 07:18 PM

Hello All,
Fedora 20 on a UEFI motherboard.
For some reason I now have linux rescue as the default boot, instead of the latest kernel.
How can I restore the normal boot order, which used to put linux rescue after the kernels?

Cheers,
Terry

syg00 · 06-12-2014, 08:20 PM

So the "rescue" option is actually listed first ?.

Normally I'd just say run grub2-mkconfig and see if that fixes things, then hack GRUB_DEFAULT in /etc/default/grub and try the mkconfig again. But according to this wiki article things have moved, so you'd need to be careful where you direct the output of the mkconfig.
I did have a UEFI fedora system for a while, but it kept messing with my (firmware) boot entries so I trashed it, hence I can't go look/play for myself.

terry-duell · 06-12-2014, 08:52 PM

Quote:

Originally Posted by syg00

So the "rescue" option is actually listed first ?.

yes, and blowed if I know how that happened as I haven't been monkeying with anything related.

Quote:

Normally I'd just say run grub2-mkconfig and see if that fixes things, then hack GRUB_DEFAULT in /etc/default/grub and try the mkconfig again. But according to this wiki article things have moved, so you'd need to be careful where you direct the output of the mkconfig.

According to that link it looks to me as though the output of grub2-mkconfig should be directed to /boot/efi/EFI/fedora/grub.cfg.

I'm unclear as to what I need to do to GRUB_DEFAULT in /etc/default/grub. Here is what is currently in that file...

Code:

GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="vconsole.font=latarcyrheb-sun16 $([ -x /usr/sbin/rhcrashkernel-param ] && /usr/sbin/rhcrashkernel-param || :) rhgb quiet"
GRUB_DISABLE_RECOVERY="true"

Cheers,
Terry

syg00 · 06-12-2014, 09:18 PM

GRUB_DEFAULT is zero-based, so if the kernel you want is (always) the second "menuentry", set GRUB_DEFAULT=1.
This will of course rely on future updates keeping the wanted kernel second - easy to re-fix if needed.

Also keep in mind you may lose your change at any time if grub is re-shipped.
See my sigline before you start.

terry-duell · 06-12-2014, 10:35 PM

I set GRUB_DEFAULT=1, didn't do anything else, and it has no effect.
I am not at all confident about running grub2-mkconfig, as it now isn't clear where the output should be directed.
Some stuff I've read says use "grub2-mkconfig -o /boot/grub2/grub.cfg", but other stuff suggests "grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg"
I currently do not have a "/boot/grub2/grub.cfg". There is a "/boot/grub2/" but it only contains "themes' (a dir) and file "grubenv".
There is a "/boot/efi/EFI/fedora/grub.cfg", and that would suggest that is where the output of grub2-mkconfig should go, but blowed if I can see that anywhere in Fedora docs.

Cheers,
Terry

syg00 · 06-12-2014, 10:43 PM

Correct - the mkconfig uses the /etc/default/grub to help build the grub.cfg - the change does nothing by itself.
All the /boot/grub[2]/grub.cfg references you are finding are non-UEFI (i.e. historical BIOS/MBR) systems - that was everyone until quite recently. You need to build /boot/efi/EFI/fedora/grub.cfg

If I get bored watching the world cup over the weekend, I might re-build a F20 on UEFI.

terry-duell · 06-12-2014, 11:24 PM

Quote:

Originally Posted by syg00

Correct - the mkconfig uses the /etc/default/grub to help build the grub.cfg - the change does nothing by itself.
All the /boot/grub[2]/grub.cfg references you are finding are non-UEFI (i.e. historical BIOS/MBR) systems - that was everyone until quite recently. You need to build /boot/efi/EFI/fedora/grub.cfg

OK...done, done and All done!
Running "grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg" has done the trick.
The linux rescue versions are now relegated to the bottom of the heap, where they usually (and should) reside.
No need to fiddle with "/etc/default/grub".
Thanks for your help.

Cheers,
Terry