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GRUB since 93a786a00 (kern/efi/sb: Enforce verification of font files) has enforced verification of font files in secure boot mode. In order to continue to be able to load some default fonts, vendors may bundle them with their signed EFI image by adding them to the built-in memdisk. This change makes the font loader try loading fonts from the memdisk before the prefix path when attempting to load a font file by specifying its filename, which avoids having to make changes to GRUB configurations in order to accommodate memdisk bundled fonts. It expects the directory structure to be the same as fonts stored in the prefix path, i.e. /fonts/<name>.pf2. Signed-off-by: Chris Coulson <chris.coulson@canonical.com> Reviewed-by: Steve McIntyre <93sam@debian.org> Tested-by: Steve McIntyre <93sam@debian.org> Reviewed-by: Robbie Harwood <rharwood@redhat.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'