I installed newest cinnamon 24.04, and while in previous version everything works just fine, in this version I have 'ghost monitor', which cannot be turned off in Display settings, but cursor can wander there. If I open nvidia settings, I see this:
So there is some prime display, which cannot be controlled. I tried recommendation to add initcall_blacklist=simpledrm_platform_driver_init as kernel parameter, but this just make OS unbootable.
I guess this was induced by upgrading lenovo firmware, which I probably can downgrade back. But is there any other better solution? How to get rid of this PRIME display, which is rather sub-prime, since it does not display anything and just makes your work harder.