It sounds like you're experiencing an issue with `kwin_x11` consuming 100% of your CPU. This can be quite frustrating. Here are a few steps you can try to troubleshoot and resolve the issue:
1. **Restart KWin**:
```sh
kwin_x11 --replace &
```
2. **Check for Updates**: Sometimes, bugs causing high CPU usage are fixed in newer versions of the software. Make sure your system and KWin are up to date.
3. **Disable Desktop Effects**: Sometimes desktop effects can cause high CPU usage. You can disable them in System Settings under "Desktop Effects."
4. **Check for Rogue Widgets or Extensions**: Sometimes, a widget or extension might be causing the issue. Try disabling them to see if the CPU usage drops.
5. **Review Logs**: Check the system logs for any errors or warnings that might give you a clue as to why `kwin_x11` is using so much CPU. You can use `journalctl` for this:
```sh
journalctl -xe
```
6. **Reboot**: Sometimes a simple reboot can resolve high CPU usage issues.
If none of these steps work, you might want to consider reporting the issue to the KDE bug tracker with as much detail as possible about your system and the issue you're experiencing.
