Lubuntu typically uses the LXQt desktop environment, which doesn't come with KWin by default. However, you can install KWin and use it as your window manager if you prefer. Here's how you can do it:
1. **Install KWin:**
Open a terminal and run the following command:
```bash
sudo apt-get install kwin-x11
```
2. **Configure LXQt to use KWin:**
After installing KWin, you need to configure LXQt to use it as the window manager. You can do this by editing the LXQt configuration files.
Open the file `~/.config/lxqt/session.conf` in a text editor:
```bash
nano ~/.config/lxqt/session.conf
```
Find the line that starts with `window_manager=` and change it to:
```bash
window_manager=kwin_x11
```
3. **Restart LXQt:**
Log out and log back in, or restart your computer to apply the changes.
After doing this, KWin should be your window manager in Lubuntu with LXQt.
