There are a few non-Mac vendors that still support S3 sleep mode. I think Thinkpads still work. The problem is that it requires vendors to support it in the BIO

There are a few non-Mac vendors that still support S3 sleep mode. I think Thinkpads still work. The problem is that it requires vendors to support it in the BIOS. Windows no longer supports S3 sleep mode, so vendors aren't willing to add that feature just for Linux users. Previous discussion: https://news.ycombinator.com/item?id=33846437 https://news.ycombinator.com/item?id=33846437