Voila ce que j'ai chez moi, pour avoir mon image (london_eyes.png) sur mon grub.
/etc/default/grub
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=0
GRUB_CMDLINE_LINUX="rd.md=0 rd.lvm=0 rd.dm=0 $([ -x /usr/sbin/rhcrashkernel-param ] && /usr/sbin/rhcrashkernel-param || :) vconsole.keymap=fr rd.luks=0 rhgb quiet vga=0x360"
GRUB_DISABLE_RECOVERY="true"
GRUB_GFXMODE=1600x900
GRUB_GFXPAYLOAD_LINUX=keep
GRUB_TERMINAL_OUTPUT=gfxterm
GRUB_THEME="/boot/grub2/themes/system/theme.txt"
GRUB_GFXPAYLOAD_LINUX=text
/boot/grub2/themes/system
dominique@host-192-168-1-2 ~$ ls /boot/grub2/themes/system
background.png COPYING.CC-BY-SA-3.0 terminal_box_ne.png
blob_w.png DejaVuSans-10.pf2 terminal_box_n.png
boot_menu_c.png DejaVuSans-12.pf2 terminal_box_nw.png
boot_menu_e.png DejaVuSans-Bold-14.pf2 terminal_box_se.png
boot_menu_ne.png london_eyes.png terminal_box_s.png
boot_menu_n.png README terminal_box_sw.png
boot_menu_nw.png slider_c.png terminal_box_w.png
boot_menu_se.png slider_n.png theme.txt
boot_menu_s.png slider_s.png unicode.pf2
boot_menu_sw.png terminal_box_c.png
boot_menu_w.png terminal_box_e.png
dominique@host-192-168-1-2 ~$
et mon /boot/grub2/themes/system/theme.txt:
# Fedora Beefy Miracle theme for GRUB2
#
# Copyright (C) 2011 Daniel Tschudi, (c) 2012 Máirín Duffy
#
# This theme is derived from Daniel Tschudi's 'Starfield' grub2 theme.
# The graphics have been changed from a lighter color to a darker color,
# the size of the boot menu box has been scaled down, and the colors
# have been changed for both the text and progress bar. The highlighted
# menu icon has also been removed.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#general settings
message-font: "DejaVu Sans Regular 12"
message-color: "#fff"
message-bg-color: "#000"
terminal-box: "terminal_box_*.png"
desktop-image: "london_eyes.png"
#help bar at the bottom
+ label {
top = 100%-25
left = 0
width = 100%
height = 20
text = "@KEYMAP_MIDDLE@"
align = "center"
font = "DejaVu Sans Regular 10"
color = "#FFF"
}
#boot menu
+ boot_menu {
left = 22%
width = 56%
top = 20%
height = 35%
item_font = "DejaVu Sans Regular 12"
item_color = "#3c6eb4"
selected_item_font = "DejaVu Sans Bold 14"
selected_item_color= "#ec88a8"
#selected_item_pixmap_style = "blob_*.png"
#icon_height = 25
icon_width = 0
item_height = 30
item_padding = 0
#item_icon_space = 0
item_spacing = 0
scrollbar = true
scrollbar_width = 20
scrollbar_thumb = "slider_*.png"
menu_pixmap_style = "boot_menu_*.png"
}
#progress bar
+ progress_bar {
id = "__timeout__"
left = 15%
top = 80%
height = 20
width = 70%
font = "DejaVu Sans Regular 12"
text_color = "#fff"
fg_color = "#3c6eb4"
bg_color = "black"
border_color = "#fff"
text = "@TIMEOUT_NOTIFICATION_LONG@"
}