How to fixed icon (lxqt) are missing after upgrade lubuntu

After I upgrade lubuntu from 22.04 to 24.10. The icon (lqxt) are missing on some page such as Desktop / File Manager / lxqt perference as image

problem

Solution

  1. Update OS First!
sudo apt update
sudo apt upgrade
  1. Reinstall lxqt
sudo apt install --reinstall lxqt-core lxqt-panel lxqt-config lxqt-session
sudo apt install --reinstall lxqt-theme-* lxqt-qtplugin
sudo apt install --reinstall adwaita-icon-theme hicolor-icon-theme
  1. Clear icon
rm -rf ~/.cache/icon-cache.kcache
rm -rf ~/.cache/thumbnails/*
  1. reapply theme setting in LXQt Configuration Center > Appearance > Icon Tab
    choose a different icon theme
  1. Log Out and Log In again / or try to restart
  2. Problem solve

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