Problema con la resolución de pantalla

Saludos,

Acabo de instalar de nuevo Mageia 6. La única pega molesta que he detectado es que el escritorio no cabe en la pantalla, lo que dificulta manejar todo lo que queda en los bordes de la pantalla..

Al probar la configuración en el Centro de control el cursor del ratón desaparece durante la prueba. Al arrancar me ha indicado que no podía usar el controlador propietario porque no se hallaba disponible. La tarjeta es una Nvidia Geforce 9500 GT y el monitor un Philips 22PFL3405H.

Adjunto contenido de xorg.conf y grub.cfg.

Gracias,

I027614

xorg.conf:

# File generated by XFdrake (rev 262502)

Section "Device"
Identifier "device1"
VendorName "NVIDIA Corporation"
BoardName "NVIDIA GeForce 8100 to GeForce 415"
Driver "nouveau"
Option "DPMS"
Option "AddARGBGLXVisuals"
Option "DynamicTwinView" "false"
EndSection

Section "Device"
Identifier "device2"
VendorName "NVIDIA Corporation"
BoardName "GeForce 9500 GT"
Driver "nouveau"
Option "DPMS"
EndSection
# File generated by XFdrake (rev 262502)

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 340.101 (iurt@ecosse.mageia.org) Fri Dec 16 21:21:40 UTC 2016

# File generated by XFdrake (rev 262502)
# **********************************************************************
# Refer to the xorg.conf man page for details about the format of
# this file.
# **********************************************************************

Section "ServerLayout"
Identifier "layout1"
Screen 0 "Screen0" 0 0
Option "Xinerama" "0"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "Module"
Load "v4l" # Video for Linux
EndSection

Section "ServerFlags"
Option "allowmouseopenfail"

# allows the server to start up even if the mouse does not work
#DontZoom # disable / (resolution switching)
Option "DontZap" "False" # disable (server abort)
EndSection

Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection

Section "Monitor"
# TV fullscreen mode or DVD fullscreen output.
# 768x576 @ 79 Hz, 50 kHz hsync
Identifier "monitor1"
VendorName "Plug'n Play"
ModeLine "768x576" 50.00 768 832 846 1000 576 590 595 630
ModeLine "768x576" 63.07 768 800 960 1024 576 578 590 616
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Philips PHI22PFL3405H"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 76.0
EndSection

Section "Screen"
Identifier "screen1"
Device "device1"
Monitor "monitor1"
DefaultDepth 24
EndSection

Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "metamodes" "1920x1080 +0+0 {viewportout=1850x1040+35+19}"
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "Stereo" "0"

Subsection "Display"
Depth 24
EndSubsection
Option "nvidiaXineramaInfoOrder" "DFP-1"
Option "BaseMosaic" "off"
EndSection

grub.cfg:

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub2-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
set pager=1

if [ -s $prefix/grubenv ]; then
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="${saved_entry}"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi

function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}

function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}

if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 24f91800-b5fa-4946-9b30-19968911c57e
else
search --no-floppy --fs-uuid --set=root 24f91800-b5fa-4946-9b30-19968911c57e
fi
font="/share/grub/unicode.pf2"
fi

if loadfont $font ; then
set gfxmode=1024x768x32
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=es_ES
insmod gettext
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
insmod gfxmenu
loadfont ($root)/boot/grub2/themes/maggy/MageiaLogo-Bold-16.pf2
loadfont ($root)/boot/grub2/themes/maggy/MageiaLogo-Bold-20.pf2
loadfont ($root)/boot/grub2/themes/maggy/MageiaLogo-Bold-28.pf2
loadfont ($root)/boot/grub2/themes/maggy/MageiaLogo-Regular-20.pf2
insmod png
set theme=($root)/boot/grub2/themes/maggy/theme.txt
export theme
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=10
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/01_users ###
if [ -f ${prefix}/user.cfg ]; then
source ${prefix}/user.cfg
if [ -n "${GRUB2_PASSWORD}" ]; then
set superusers="root"
export superusers
password_pbkdf2 root ${GRUB2_PASSWORD}
fi
fi
### END /etc/grub.d/01_users ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Mageia' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-simple-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
savedefault
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.9.56-desktop-1.mga6 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro nokmsboot splash quiet noiswmd resume=UUID=b256942e-d221-4af4-8f8c-9b4cdf00155e vga=794
initrd16 /boot/initrd-4.9.56-desktop-1.mga6.img
}
submenu 'Opciones avanzadas para Mageia' $menuentry_id_option 'gnulinux-advanced-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
menuentry 'Mageia (4.9.56-desktop-1.mga6) 6' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.9.56-desktop-1.mga6-advanced-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
savedefault
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.9.56-desktop-1.mga6 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro nokmsboot splash quiet noiswmd resume=UUID=b256942e-d221-4af4-8f8c-9b4cdf00155e vga=794
initrd16 /boot/initrd-4.9.56-desktop-1.mga6.img
}
menuentry 'Mageia (4.9.56-desktop-1.mga6) 6 (recovery mode)' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.9.56-desktop-1.mga6-recovery-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.9.56-desktop-1.mga6 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro failsafe
initrd16 /boot/initrd-4.9.56-desktop-1.mga6.img
}
menuentry 'Mageia (4.4.92-desktop-1.mga5) 6' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.4.92-desktop-1.mga5-advanced-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
savedefault
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.4.92-desktop-1.mga5 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro nokmsboot splash quiet noiswmd resume=UUID=b256942e-d221-4af4-8f8c-9b4cdf00155e vga=794
initrd16 /boot/initrd-4.4.92-desktop-1.mga5.img
}
menuentry 'Mageia (4.4.92-desktop-1.mga5) 6 (recovery mode)' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.4.92-desktop-1.mga5-recovery-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.4.92-desktop-1.mga5 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro failsafe
initrd16 /boot/initrd-4.4.92-desktop-1.mga5.img
}
menuentry 'Mageia (4.4.88-desktop-1.mga5) 6' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.4.88-desktop-1.mga5-advanced-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
savedefault
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.4.88-desktop-1.mga5 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro nokmsboot splash quiet noiswmd resume=UUID=b256942e-d221-4af4-8f8c-9b4cdf00155e vga=794
initrd16 /boot/initrd-4.4.88-desktop-1.mga5.img
}
menuentry 'Mageia (4.4.88-desktop-1.mga5) 6 (recovery mode)' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.4.88-desktop-1.mga5-recovery-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.4.88-desktop-1.mga5 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro failsafe
initrd16 /boot/initrd-4.4.88-desktop-1.mga5.img
}
menuentry 'Mageia (4.4.82-desktop-1.mga5) 6' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.4.82-desktop-1.mga5-advanced-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
savedefault
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.4.82-desktop-1.mga5 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro nokmsboot splash quiet noiswmd resume=UUID=b256942e-d221-4af4-8f8c-9b4cdf00155e vga=794
initrd16 /boot/initrd-4.4.82-desktop-1.mga5.img
}
menuentry 'Mageia (4.4.82-desktop-1.mga5) 6 (recovery mode)' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.4.82-desktop-1.mga5-recovery-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.4.82-desktop-1.mga5 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro failsafe
initrd16 /boot/initrd-4.4.82-desktop-1.mga5.img
}
menuentry 'Mageia (4.4.79-desktop-1.mga5) 6' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.4.79-desktop-1.mga5-advanced-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
savedefault
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.4.79-desktop-1.mga5 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro nokmsboot splash quiet noiswmd resume=UUID=b256942e-d221-4af4-8f8c-9b4cdf00155e vga=794
initrd16 /boot/initrd-4.4.79-desktop-1.mga5.img
}
menuentry 'Mageia (4.4.79-desktop-1.mga5) 6 (recovery mode)' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.4.79-desktop-1.mga5-recovery-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.4.79-desktop-1.mga5 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro failsafe
initrd16 /boot/initrd-4.4.79-desktop-1.mga5.img
}
menuentry 'Mageia (4.4.74-desktop-1.mga5) 6' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.4.74-desktop-1.mga5-advanced-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
savedefault
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.4.74-desktop-1.mga5 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro nokmsboot splash quiet noiswmd resume=UUID=b256942e-d221-4af4-8f8c-9b4cdf00155e vga=794
initrd16 /boot/initrd-4.4.74-desktop-1.mga5.img
}
menuentry 'Mageia (4.4.74-desktop-1.mga5) 6 (recovery mode)' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.4.74-desktop-1.mga5-recovery-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-4.4.74-desktop-1.mga5 root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro failsafe
initrd16 /boot/initrd-4.4.74-desktop-1.mga5.img
}
menuentry 'Mageia (desktop) 6' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-desktop-advanced-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
savedefault
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-desktop root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro nokmsboot splash quiet noiswmd resume=UUID=b256942e-d221-4af4-8f8c-9b4cdf00155e vga=794
initrd16 /boot/initrd-desktop.img
}
menuentry 'Mageia (desktop) 6 (recovery mode)' --class mageia --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-desktop-recovery-28b0dc49-cc1b-4974-96bb-15d7faba3b0b' {
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
else
search --no-floppy --fs-uuid --set=root 28b0dc49-cc1b-4974-96bb-15d7faba3b0b
fi
linux16 /boot/vmlinuz-desktop root=UUID=28b0dc49-cc1b-4974-96bb-15d7faba3b0b ro failsafe
initrd16 /boot/initrd-desktop.img
}
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_ppc_terminfo ###
### END /etc/grub.d/20_ppc_terminfo ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###