我在启动 PC 时遇到问题。我什么都没做，但当我打开它时，它显示一个屏幕 -
（屏幕变黑）
上面写着：
Ubuntu 18.04.5 lts harshit-lenovo-ideapad-100-15IBY tty1
Harshit-lenovo-ideapad-100-15IBY login:
当您登录时会显示：
Last login: Tue Sep 1 11:04:27 IST 2020 on tty1
Welcome to Ubuntu 18.04.5 LTS (GNU/Linux 5.4.0-42-generic x86_64)
*Documentation: https://help.ubuntu.com
*Management: https://landscape.canonical.com
*Support: https://Ubuntu.com/advantage
*Canonical livepatch is available for installation.
- Reduce system reboots and improve Kernel security. Activate at:
Https://ubuntu.com/livepatch
0 packages can be updated.
0 updates are security updates.
Failed to connect to https:// changelings.ubuntu.com/meta-release-lts. Check your internet connection or proxy settings
Your hardware enablement stack (HWE) is supported until April 2023.
Harshit@harshit-lenovo-ideapad-100-15IBY:~$