以下操作可能導致系統無法啟動、黑屏等各種錯誤，請謹慎操作，本人不負任何責任。

如需更新Chrome OS,請先確保Brunch核心已經支援該版本的Chrome OS。

升級Brunch核心可以參考https://github.com/sebanc/brunch/tree/r85-k4.19-testing-20200919

Update only the Brunch framework (if you have enabled native ChromeOS updates)

If you chose to use the "enable_updates" option and have updated to a new ChromeOS release, you might want to update the brunch framework to match your current ChromeOS version.

1. Download the Brunch release corresponding to your ChromeOS version (from the GitHub release section).
2. Open the ChromeOS shell (CTRL+ALT+T and entershellat the invite)
3. Update the framework:

sudo chromeos-update -f < path to the Brunch release archive >

4. Restart ChromeOS

在Brunch核心中預設會關閉Chrome OS自動更新功能

1)進入ubuntu

2)開啟Grub Customizer

3)選擇安裝Chrome OS時設定的路徑，我設定的名字是Chrome OS

4)在img_path=$img_path 後面新增options=enable_updates

5)儲存退出