nv-control-warpblend stopped working with driver version 570

[retostockli]

I have used the warp and blend features outlined in the nv-contro-warpblend.c sample code for many years now with different NVIDIA RTX cards on Ubuntu Linux.

Since the switch to the nvidia version 570 from 550 today they don't work any more.

There is no error, the warping and blending simply stopped. I have reverted to driver version 550 and the code started working again.

Is there any change on how the warp and blend features of the NVIDIA RTX cards are acessed which is not reflected in the nv-control-warpblend sample code?

Cheers
Reto