Ubuntu 22.04.2 LTS更新后加密验证完成后黑屏无法进入登录界面的求助

Hi there, sorry to hear you're stuck with this black screen right after disk encryption verification—those Mutter updates you listed are almost certainly the culprit. Let's work through some fixes that should get you back to the login screen:

1. 回滚Mutter相关的更新包 #

Since you can access recovery mode, this is the most direct fix. Here's how to do it:

• Boot into recovery mode, then select root shell from the menu.
• First, remount your root partition as read-write (recovery mode defaults to read-only):

  mount -o remount,rw /
  

• Now downgrade the three Mutter packages to their previous working versions:

  apt install libmutter-10-0=42.5-0ubuntu1 mutter-common=42.5-0ubuntu1 gir1.2-mutter-10=42.5-0ubuntu1
  

• To prevent these packages from updating again until a fix is released, mark them as held:

  apt-mark hold libmutter-10-0 mutter-common gir1.2-mutter-10
  

• Finally, reboot your system:

  reboot
  

2. 修复或更换显示管理器 #

If rolling back the updates doesn't work, the issue might be with the GNOME Display Manager (GDM) that handles the login screen:

• From the root shell (after remounting read-write), try reinstalling GDM3:

  apt install --reinstall gdm3
  

• If GDM3 is still misbehaving, you can switch to LightDM as an alternative display manager:

  apt install lightdm
  

  When prompted, select lightdm as your default display manager, then reboot.

3. 排查系统日志（如果以上方法都失效） #

To get more details about what's causing the black screen, check the system logs from your failed boot:

• From the root shell, run this command to view logs from the last boot:

  journalctl -b -1
  

• Look for error messages related to mutter, gdm, or display—these can help pinpoint if there's a deeper issue with your graphics setup.

Let me know if you run into any issues with these steps, or if you need more details about any part of the process!

备注：内容来源于stack exchange，提问作者Iubar