Comment # 3 on bug 1201632 from Friedrich Haubensak

update:  after installing kernel-default-5.3.18-150300.59.87.1, qemu guests
still do not start.

using virt-manager to display the virtual console window and then click Virtual
Machine -> Run, the console window turns from grey to pure black, that's all,
nothing more happens.

running "virsh start GUEST" from the HOST console, freezes HOST; have to press
reset-button on HOST.

booting HOST with kernel-default-5.3.18-150300.59.76.1, qemu guests start and
work well.

have now done "zypper al kernel-default", but this seems not to be a real
solution...