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sstallion/convert-bgrt.sh

Last active May 20, 2024 00:44
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Convert UEFI BGRT image
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convert-bgrt.sh
#!/bin/sh -e
# convert-bgrt.sh - convert UEFI BGRT image
BGRT_DIR=/sys/firmware/acpi/bgrt
if [ ! -d $BGRT_DIR ]; then
echo "BGRT not found" >&2
exit 1
fi
if [ $# -lt 2 ]; then
echo "usage: `basename $0` size file" >&2
exit 1
fi
X=`cat $BGRT_DIR/xoffset`
Y=`cat $BGRT_DIR/yoffset`
convert -background black -extent $1-$X-$Y $BGRT_DIR/image $2
exit 0
@sstallion
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sstallion commented Jan 21, 2017 •
edited
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Create a GRUB2 background image that matches the UEFI boot image:

# dnf -y install ImageMagick
# sh convert-bgrt.sh 1920x1080 /boot/efi/EFI/fedora/background.png
# echo 'GRUB_BACKGROUND="/boot/efi/EFI/fedora/background.png"' >> /etc/default/grub
# grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg

GRUB_TERMINAL should be set to gfxterm or commented out in /etc/default/grub. This method works with UEFI Secure Boot provided the gfxterm_background module is included in the grub image.

background

@Grief
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Grief commented May 9, 2023

Thanks!
foo

@sstallion
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Awesome!

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