Grub2 添加背景图片

今天尝试安装了一下 Ubuntu 18.04.1，现在安装系统越来越简单了，用 Rufus 做一个 U 盘启动盘，然后就正常下一步就行了，Ubuntu 直接提供安装 Windows 和 Ubuntu 双系统的选项。

安装之后想利用 Grub2 引导器页面的背景图片功能装个逼，把笔记本电脑厂商 logo 之后、Windows 启动之前那段黑屏加一个打着自己 logo 的背景图片。研究明白之后还是很简单的，不过查的过程还是挺麻烦的。

Add a grub background image#

First, add grub background image support.

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sudo apt install grub2-splashimages

Then, copy a image to /boot/grub/.

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cp bg.png /boot/grub/

Now, you can use

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sudo update-grub

to apply the change.

You can have a try now. And then, you will find that the 10 seconds timeout is really annoying.

No timeout and no menu#

Edit /etc/default/grub. Add or edit following settings.

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GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=1

I will also set GRUB_DEFAULT to 2, so the highlight selected default boot choice will be the 3rd option, which means Windows boot manager.

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GRUB_DEFAULT=2

It seems everything is ready, but grub do more things. Grub checks if you have multiple systems. If more than one system was found, grub will force timeout_style to be menu. This is not what we expected.

So open /etc/grub.d/03_os-prober, and remove the last line

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adjust_timeout

Now, run update-grub and restart.

You can see the splash image and no menu is shown. Windows boot after a brief delay.

If you want to switch back to Ubuntu, you can press Esc during that 1 second timeout to get back the boot options menu, and select a different system to boot.

More details#

Related files and functions#

  • /boot/grub/grub.cfg
  • /etc/default/grub
  • /etc/grub.d/00_header function make_timeout()
  • /etc/grub.d/03_os-prober function adjust_timeout()

Related links#