It sounds like you're having an issue with KWin on Wayland using 100% of your CPU. This can be quite frustrating. Here are a few steps you can take to troubleshoot and possibly resolve the issue:
1. **Restart KWin**: Sometimes simply restarting KWin can resolve high CPU usage.
```sh
kwin_x11 --replace
```
2. **Check for Updates**: Make sure your system and all packages are up to date. Sometimes, high CPU usage issues are resolved in newer versions.
```sh
sudo apt update && sudo apt upgrade
```
3. **Disable Effects**: Disable desktop effects to see if this reduces CPU usage.
- Go to System Settings > Desktop Effects and disable some or all of them.
4. **Check Logs**: Look at system logs to see if there are any errors or warnings that might give a clue about what's causing the high CPU usage.
```sh
journalctl -xe
```
5. **Investigate Running Processes**: Use a system monitor tool to see if there are any other processes that might be contributing to the high CPU usage.
- You can use `htop` or `top` to get a detailed view of running processes.
6. **Switch to X11**: If the issue persists and you need a quick fix, consider switching back to X11 until the issue is resolved.
- You can select X11 from the login screen options.
7. **Report a Bug**: If none of the above steps help, consider reporting a bug to the KDE developers. Provide them with all relevant information, including system logs and steps to reproduce the issue.
Hopefully, one of these steps will help you get your CPU usage back to normal.
