QXL Regression
Since update to 5.1 (or any higher version) X11 is completely stuck when working with Spice/QXL (in a VM). This worked just fine with any previous version of 5.0 (or lower).
I didnt see anything special in x logs or kernel messages. but the only difference between working/not working is a different kernel.
problem does not exist when working with Fedora.