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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style type="text/css">
@import url('../css/main.css');
</style>
<title>GRUB payload</title>
</head>
<body><div class="section"><p>If you're using libreboot from git, note that only CrOS devices build at the moment. We merged a newly rewritten build system recently, and we've yet to complete re-integration of older boards into Libreboot. Use Libreboot 20160907 for the time being, unless you're involved in libreboot development</p></div>
<div class="section">
<h1 id="pagetop">GRUB payload</h1>
<p>
This section relates to the GRUB payload used in libreboot.
</p>
<p>
Or <a href="../">Back to main index</a>.
</p>
<ul>
<li><a href="#grub_background">Changing the background image in GRUB</a></li>
<li><a href="#grub_font">Setting font in GRUB</a></li>
<li><a href="#grub_keyboard">GRUB keyboard layouts</a>
<ul>
<li><a href="#grub_custom_keyboard">Custom keyboard layout in GRUB</a></li>
<li><a href="#grub_ukdvorak_keyboard">UK Dvorak keyboard layout in GRUB</a></li>
</ul>
</li>
</ul>
</div>
<div class="section">
<h1 id="grub_background">Changing the background image in GRUB</h1>
<p>
Use cbfstool from libreboot_util, or libreboot_src/coreboot/util/cbfstool/ if you want to build from source.
</p>
<p>
./cbfstool yourrom.rom remove background.png -n background.png<br/>
./cbfstool yourrom.rom add -f background.png -n background.png -t raw
</p>
<p>
When you've done this, re-flash your ROM and you should have a new background at boot time.
</p>
</div>
<div class="section">
<h1 id="grub_font">Setting font in GRUB (for reference)</h1>
<p>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)</p>
<p>The old font used was Unifont, and this had some missing characters: for instance, the border showed ??? characters instead of lines.</p>
<p>I tried DeJavu Sans Mono from this website:
<a href="http://dejavu-fonts.org/wiki/Download">dejavu-fonts.org</a></p>
<p>Specifically, the version that I chose was the latest at the time of writing (Saturday 21 June 2014):
<a href="http://sourceforge.net/projects/dejavu/files/dejavu/2.34/dejavu-fonts-ttf-2.34.tar.bz2">this one</a></p>
<p>This is a free font that is also contained in GNU+Linux distributions like Debian, Devuan or Parabola.</p>
<p><b>$ cd libreboot_src/grub</b><br/>
compile grub (the build scripts info on how to do this)<br/>
come back out into libreboot_src/resources/grub:<br/>
<b>$ cd ../libreboot_src/resources/grub/font</b></p>
<p>I took Dejavu Sans Mono from dejavu (included in this version of libreboot) and did:<br/>
<b>$ ../../../grub/grub-mkfont -o dejavusansmono.pf2 dejavu-fonts-ttf-2.34/ttf/DejaVuSansMono.ttf</b></p>
<p>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.<br/>
I then added that instructions to the grub.cfg files (to load the font):<br/>
<b>loadfont (memdisk)/dejavusansmono.pf2</b></p>
<p><a href="#pagetop">Back to top of page</a></p>
</div>
<div class="section">
<h1 id="grub_keyboard">GRUB keyboard layouts (for reference)</h1>
<div class="subsection">
<h2 id="grub_custom_keyboard">Custom keyboard layout in GRUB (for reference)</h2>
<p>
Keymaps are stored in resources/utilities/grub-assemble/keymap/.
</p>
<p>
Example (French Azerty):<br/>
<b>$ ckbcomp fr > frazerty</b><br/><br/>
Go in grub directory:<br/>
<b>cat frazerty | ./grub/grub-mklayout -o frazerty.gkb</b>
</p>
<p>
You must make sure that the files are named keymap and keymap.gkb (where 'keymap' can be whatever you want).
</p>
<p>
Then from the above example, you would put <b>frazerty</b> in <b>resources/utilities/grub-assemble/keymap/original/</b> and
the <b>frazerty.gkb</b> file goes under <b>resources/utilities/grub-assemble/keymap/</b>
</p>
<p>
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: <b>libreboot_frazerty.rom</b>.
</p>
<p><a href="#pagetop">Back to top of page</a></p>
</div>
<div class="subsection">
<h2 id="grub_ukdvorak_keyboard">UK Dvorak keyboard layout in GRUB (for reference)</h2>
<p>
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
</p>
<p><b>$ cat ukdvorak | ./grub/grub-mklayout -o ukdvorak.gkb</b></p>
<p><a href="#pagetop">Back to top of page</a></p>
</div>
</div>
<div class="section">
<p>
Copyright © 2014 Leah Rowe <info@minifree.org><br/>
Permission is granted to copy, distribute and/or modify this document
under the terms of the Creative Commons Attribution-ShareAlike 4.0 International license
or any later version published by Creative Commons;
A copy of the license can be found at <a href="../cc-by-sa-4.0.txt">../cc-by-sa-4.0.txt</a>
</p>
<p>
Updated versions of the license (when available) can be found at
<a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode">https://creativecommons.org/licenses/by-sa/4.0/legalcode</a>
</p>
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