Actually, the feature is present on a lot of Lenovos (even non-thinkpads). My anecdotal experience it that it works quite well. However it's only accessible fr

Actually, the feature is present on a lot of Lenovos (even non-thinkpads). My anecdotal experience it that it works quite well. However it's only accessible from their energy management tray program on Windows, so if you do a clean Linux install right away, you won't even know about it. You need to try the kernel module pointed out in the sibling comment.