I am having issues with putting my PC to sleep. I have a 5800X3D, an ASUS Maximus ROG motherboard and a RTX 3090. Every time I put it to sleep, instant wakeup. Journalctl shows nothing obvious to me that woke it up. I’ve disabled all ACPI wake devices. My CPU is set to s2idle deep. I am at a loss as to what is causing this, other than possibly it being an Nvidia issue. Anyone else having similar issues? Any assistance is appreciated.
Maybe try to use other GPU driver, like nouveau instead of proprietary one (or vice versa). But first unplug all peripherals and check if it helps.
Edit: this might be helpful: wiki