Ubuntu 16.04自动更新后桌面故障求助：无启动器及状态栏

Hey there, I’ve run into this exact issue a few times with Ubuntu 16.04’s Unity desktop post-update—missing launcher, no top panel, uncloseable settings windows are all classic signs of messed-up Unity components or corrupted configs. Let’s walk through fixes from simplest to more thorough:

1. Quick Unity Reset (Most Likely Fix) #

First, let’s reset Unity’s configuration to default. You’ll need a terminal:

• Press Ctrl+Alt+T to open a terminal (if that works). If not, switch to a TTY with Ctrl+Alt+F1, log in with your username and password (note: password won’t show as you type—this is normal).
• Run these commands one by one:

  dconf reset -f /org/compiz/
  setsid unity
  

• If you used a TTY, switch back to the graphical interface with Ctrl+Alt+F7, or just reboot with sudo reboot to apply changes fully.

2. Reinstall Unity Desktop Components #

If the reset didn’t work, some Unity packages might have gotten corrupted during the update:

• In the terminal/TTY, run:

  sudo apt update
  sudo apt install --reinstall ubuntu-desktop unity unity-tweak-tool
  sudo apt autoremove && sudo apt clean
  sudo reboot
  

This will refresh your package list, reinstall core desktop packages, clean up leftover files, and restart.

3. Fix Broken Package Dependencies #

Updates can sometimes leave broken dependencies that break the desktop:

• Run these commands to repair dependencies and reconfigure packages:

  sudo apt-get -f install
  sudo dpkg --configure -a
  sudo reboot
  

4. Test with a New User (Rule Out User-Specific Config Corruption) #

If all above fail, the issue might be tied to your user’s config files:

• In TTY, create a new test user:

  sudo adduser newtestuser
  sudo usermod -aG sudo newtestuser
  

• Reboot and log in with newtestuser. If the desktop works normally, your original user’s config is corrupted. You can either:
  • Copy your important files to the new user’s home directory and switch to it long-term.
  • Back up and delete corrupted config folders in your original user account (e.g., ~/.config/compiz-1/, ~/.config/dconf/) then log out/in to reset them.

Quick Tip for Uncloseable Windows #

If you can’t shut the settings window, open a terminal and run xkill—your cursor will turn into an X; click the stuck window to force-close it.

内容的提问来源于stack exchange，提问作者J. Lehmann