After installing KVM there has been audio crackling again.
So for now it looks like it is caused by virtualization hosts installed on the device. After uninstalling KVM, the sound is clean again.
For now I would assume that problems start as soon as the kernels/the CPUs virtualization interfaces are accessed. For now I mark that as a wontfix as I guess that it is a kernel problem and we need to wait for someone getting this fixed.
After installing KVM there has been audio crackling again.
So for now it looks like it is caused by virtualization hosts installed on the device. After uninstalling KVM, the sound is clean again.
For now I would assume that problems start as soon as the kernels/the CPUs virtualization interfaces are accessed. For now I mark that as a wontfix as I guess that it is a kernel problem and we need to wait for someone getting this fixed.