Thanks! but in this case I don't want to displace according to the normals. As you can see with another lw noise it works, with any of the renderman nodes it doesn't.
Unfortunately I can´t say anything about wether or not it is a bug in lw 2020 or with dp node compability.
Also, make sure you have bump strength set at 100% for the fractal, sometimes you can get a bit lost if you choose bump as main connection, which means only the bump strength value will affect the displacement, and if you use alpha..only the opacity will affect the displacement.