Indeed, I have the 3080 and noveau would really suck with it, thus the proprietary driver.
I don't compile kernels myself, I'm using Ubuntu Mainline kernels.
My new motherboard, Asus ROG Maximus Z690 Extreme doesn't go into suspend. My old motherboard of the same line, ROG Maximus XI Z390 used to suspend just fine.
So I guess my new motherboard is not supported by the current kernel (5.17) and I have to wait and hope that it will be supported in the...