ubuntu 字符模式 分辨率
以下是更改字符界面分辨率和开机自动进字符界面的步骤。系统装到虚拟机后，在Ubuntu Wiki 站点找了资料改的：（1）安装所需包：
sudo apt-get install v86d hwinfo
（2）查看framebuffer
sudo hwinfo --framebuffer
我的显示器分辨率是1280x800的所以我需要的是：1280x800-24
（3）修改grub文件
sudo gedit /etc/default/grub
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# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset video=uvesafb:mode_option=1280x800-24,mtrr=3,scroll=ywrap"
GRUB_CMDLINE_LINUX=""
# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console
# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
GRUB_GFXMODE=1280x800
# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true
# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_LINUX_RECOVERY="true"
# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"
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（4）修改initramfs:
sudo gedit /etc/initramfs-tools/modules
-------------------------------------------------------------------------------------------------------------------
# List of modules that you want to include in your initramfs.
#
# Syntax: module_name
#
# You must run update-initramfs(8) to effect this change.
#
# Examples:
#
# raid1
# sd_mod
uvesafb mode_option=1280x800-24 mtrr=3 scroll=ywrap
-------------------------------------------------------------------------------------------------------------------
（5）强制使用Framebuffer:
echo FRAMEBUFFER=y | sudo tee /etc/initramfs-tools/conf.d/splash
（6）更新grub和initramfs:
sudo update-grub2
sudo update-initramfs -u
（7）重启。
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