It’s called S0ix/Modern Standby/s2idle. It was designed to replace S3, but not only is it shit on Winshit and kekOS, it’s also very unreliable on Linux in my experience. The true issue it that manufacturers started to discontinue S3 (so shallow/standby and deep/s2ram) in favor of s2idle. You can check which actions are theoretically possible in the kernel docs, and check which are supported on your system (and enabled) by cat-ing /sys/power/mem_sleep. That’s what systemctl suspend chooses. My PC and Server still have deep, but my Laptop already only has s2idle.
Found it. AW article
It’s called S0ix/Modern Standby/s2idle. It was designed to replace S3, but not only is it shit on Winshit and kekOS, it’s also very unreliable on Linux in my experience. The true issue it that manufacturers started to discontinue S3 (so shallow/standby and deep/s2ram) in favor of s2idle. You can check which actions are theoretically possible in the kernel docs, and check which are supported on your system (and enabled) by cat-ing /sys/power/mem_sleep. That’s what systemctl suspend chooses. My PC and Server still have deep, but my Laptop already only has s2idle.
Thanks for the Arch Wiki article, really informative! It seems I have both s2idle and deep.