zmaint Thank you for the advice!
I don't want to roll back, because the problem is with kernel 5.14.15, the other updated packages are fine.
Yes, choosing the previous kernel works, it's exactly what I'm doing now, I'm writing this post on my Asus with kernel 5.14.14. Using my laptop with kernel 5.14.15 is impossible. I hope that the Solus team can find a solution, because this failure is crippling.
I assure you that this failure is not related to Plasma, my desktop with Intel and Nvidia works perfectly under Solus Plasma after the update.
If you dare to update your desktop, please let us know about the outcome.