Hello forum, I'm quite new here and I post this thread because I do not know whats going wrong .. I have as guest OS Xubuntu 20.10. I installed Wine 6.0 and a Windows application within. As long as I do not have the Parallels tools installed everything works fine. After installing Parallels tools the picture is flipped complete: So it seems something has happened after installing Parallels tools ... After uninstalling Parallels tools everything is working fine again.