方法:
1.在 /etc/modprobe.d/blacklist-framebuffer.conf 里注释掉"blacklist vesafb"并添加一行 "blacklist vga16fb"
2.在 /etc/initramfs-tools/modules里添加 fbcon 和 vesafb
在终端运行 sudo update-initramfs -u -k `uname -r`
3.执行 sudo gedit /boot/grub/grub.cfg
找到linux启动项，在kernel行之前加入 set gfxpayload=1024x768x16（此处不能改）
我的配置文件内容如下：
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
load_env
fi
set default="0"
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 recordfail {
set recordfail=1
if [ -n ${have_grubenv} ]; then if [ -z ${boot_once} ]; then save_env recordfail; fi; fi
}
insmod ext2
set root='(hd0,9)'
search --no-floppy --fs-uuid --set bc0a0ec5-2618-4ff8-8582-d8f6d1a543c8
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
insmod gfxterm
insmod vbe
if terminal_output gfxterm ; then true ; else
# For backward compatibility with versions of terminal.mod that don't
# understand terminal_output
terminal gfxterm
fi
fi
insmod ext2
set root='(hd0,9)'
search --no-floppy --fs-uuid --set bc0a0ec5-2618-4ff8-8582-d8f6d1a543c8
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
if [ ${recordfail} = 1 ]; then
set timeout=-1
else
set timeout=10
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Ubuntu, with Linux 2.6.32-24-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,9)'
search --no-floppy --fs-uuid --set bc0a0ec5-2618-4ff8-8582-d8f6d1a543c8
set gfxpayload=1024x768x16
linux /boot/vmlinuz-2.6.32-24-generic root=UUID=bc0a0ec5-2618-4ff8-8582-d8f6d1a543c8 ro splash quiet splash
initrd /boot/initrd.img-2.6.32-24-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-24-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,9)'
search --no-floppy --fs-uuid --set bc0a0ec5-2618-4ff8-8582-d8f6d1a543c8
echo 'Loading Linux 2.6.32-24-generic ...'
linux /boot/vmlinuz-2.6.32-24-generic root=UUID=bc0a0ec5-2618-4ff8-8582-d8f6d1a543c8 ro single splash
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.32-24-generic
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod ext2
set root='(hd0,9)'
search --no-floppy --fs-uuid --set bc0a0ec5-2618-4ff8-8582-d8f6d1a543c8
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod ext2
set root='(hd0,9)'
search --no-floppy --fs-uuid --set bc0a0ec5-2618-4ff8-8582-d8f6d1a543c8
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Microsoft Windows XP Professional (on /dev/sda1)" {
insmod fat
set root='(hd0,1)'
search --no-floppy --fs-uuid --set f87a-2a85
drivemap -s (hd0) ${root}
chainloader +1
}
### 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 ###
保存文件退出重启就有效果了。