This section relates to the GRUB payload used in libreboot.
Use cbfstool from libreboot_util, or libreboot_src/coreboot/util/cbfstool/ if you want to build from source.
$ ./cbfstool yourrom.rom remove background.png -n background.png $ ./cbfstool yourrom.rom add -f background.png -n background.png -t raw
When you’ve done this, re-flash your ROM and you should have a new background at boot time.
You don’t need to do this unless you would like to change the default font yourself. (this is just for reference. It has already been done for you)
The old font used was Unifont, and this had some missing characters: for instance, the border showed ??? characters instead of lines.
I tried DeJavu Sans Mono from this website: dejavu-fonts.org
Specifically, the version that I chose was the latest at the time of writing (Saturday 21 June 2014): this one
This is a free font that is also contained in GNU+Linux distributions like Debian, Devuan or Parabola.
$ cd libreboot\_src/grub
compile grub (the build scripts info on how to do this)
come back out into libreboot_src/resources/grub:
$ cd ../libreboot\_src/resources/grub/font
I took Dejavu Sans Mono from dejavu (included in this version of libreboot) and did:
$ ../../../grub/grub-mkfont -o dejavusansmono.pf2 dejavu-fonts-ttf-2.34/ttf/DejaVuSansMono.ttf
I then added the instructions to ‘gen.sh’ script in grub-assemble to include resources/grub/dejavusansmono.pf2 in all of the ROM images, at the root of the GRUB memdisk.
I then added that instructions to the grub.cfg files (to load the font):
Keymaps are stored in resources/utilities/grub-assemble/keymap/.
Example (French Azerty):
$ ckbcomp fr > frazerty
Go in grub directory:
$ cat frazerty | ./grub/grub-mklayout -o frazerty.gkb
You must make sure that the files are named keymap and keymap.gkb (where ‘keymap’ can be whatever you want).
Then from the above example, you would put
resources/utilities/grub-assemble/keymap/original/ and the
frazerty.gkb file goes under
The build scripts will automatically see this, and automatically build ROM images with your custom layout (given the name) and include them under bin. Example:
ukdvorak had to be created manually, based on usdvorak. diff them (under resources/utilities/grub-assemble/keymap/original) to see how ukdvorak file was created
$ cat ukdvorak | ./grub/grub-mklayout -o ukdvorak.gkb
Copyright © 2014 Leah Rowe firstname.lastname@example.org
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License Version 1.3 or any later version published by the Free Software Foundation with no Invariant Sections, no Front Cover Texts, and no Back Cover Texts. A copy of this license is found in ../fdl-1.3.html
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