Resetting BIOS settings did not help. Seems like more people in other threads are having the same issue too:
In any case, after filing a support ticket and a huge amount of forwards and backwards with them (for some reason they were first dead set on verifying my order, and I am quoting support here directly, for “security reasons”… when the issue we’re talking about is public and unrelated to my order / account… then they tried to offload all of their QA on me, insisting that “it’s my installation”), I finally got the following response:
Hi Andy,
Spoke with engineering for clarification on deep sleep not working. Yes, you will be using s2idle as we have found that the later BIOS are not supporting deep.
If there is anything else we can help with, let me know.
Kind regards,
Matt
This also seems to concur with:
and:
I note that as of this post the 3.20 BIOS release notes still do NOT state this.
Guys, I really think we need to bring this despicable and/or careless behaviour to Linus TT (who is an investor and is rather vocal about poor corpo behaviour) attention – how any of this (denying bios downgrades; not fixing sleep power consumption issues for 3 years; soft-bricking customer devices; not specifying significant changes in bios release notes; etc) is acceptable…