Ubuntu 16.04 更新重启后图标全部消失，求有效恢复方案

Hey there, sorry to hear you're stuck with missing icons after updating your Ubuntu 16.04 system—total bummer when that happens! Since the Xubuntu-focused solutions didn't work, let's dive into Unity-specific fixes (Ubuntu 16.04's default desktop) that usually resolve this issue.

Step 1: Reset Unity & Compiz Configurations #

Compiz (Unity's window manager) often gets glitchy after updates. Let's wipe its wonky settings:

• Open a terminal (press Ctrl+Alt+T; if even the terminal icon is gone, use Ctrl+Alt+F1 to switch to a text-only TTY, then log in with your credentials)
• Run this command to reset all Compiz/Unity configs:

  dconf reset -f /org/compiz/
  

• Restart Unity to apply changes:

  setsid unity
  

• Wait 10-15 seconds—if icons don't pop back up, reboot your system:

  sudo reboot
  

Step 2: Reinstall Icon Themes & Unity Core Components #

Updates can sometimes corrupt package files. Let's refresh the default icon themes and Unity's core bits:

• First, update your package list:

  sudo apt update
  

• Reinstall Ubuntu's default icon themes:

  sudo apt install --reinstall ubuntu-mono ubuntu-icon-theme
  

• Next, refresh Unity's core packages:

  sudo apt install --reinstall unity unity-tweak-tool
  

• Reboot again to make sure all changes stick:

  sudo reboot
  

Step 3: Fix User Directory & Desktop Icon Settings #

Corrupted user config files might be hiding your icons. Let's reset those:

• First, back up your current user directory config (just in case):

  cp ~/.config/user-dirs.dirs ~/.config/user-dirs.dirs.bak
  

• Reset the user directory mappings:

  xdg-user-dirs-update
  

• Ensure Nautilus (Ubuntu's file manager) is set to show desktop icons:

  gsettings set org.gnome.nautilus.desktop icons-view true
  

• If your Unity Launcher icons are missing too, reset the launcher favorites list to defaults:

  gsettings reset com.canonical.Unity.Launcher favorites
  

  You can re-add your favorite apps later using Unity Tweak Tool.

Step 4: Switch Desktop Environments (Last Resort) #

If nothing else works, switching to a temporary desktop and back to Unity can fix stuck configurations:

• Install the GNOME desktop environment:

  sudo apt install ubuntu-gnome-desktop
  

• Reboot your system. At the login screen, click the gear icon in the top-right corner and select GNOME (not GNOME Classic) to log in.
• Check if icons appear here. If they do, reboot again, switch back to Unity from the login screen's gear menu, and your icons should be restored.

内容的提问来源于stack exchange，提问作者Milton