AFAIK this is mandated by Microsoft for Windows compatibility. To support the latest s0i3 (hybrid sleep, like a smartphone) the machine is not allowed to suppor

AFAIK this is mandated by Microsoft for Windows compatibility. To support the latest s0i3 (hybrid sleep, like a smartphone) the machine is not allowed to support S3 (normal sleep) TBF Linux does support s0i3,but not as well as Windows. On my X1 Carbon (2018) I had to disable a whole lot of stuff as well as do some kernel command-line fiddling. Once I did this, however, it was better than Windows. I do boot into Windows on this laptop every month or so 'cos Windows Update. Each time the fans go crazy - I will say I never see the fans go like this in Linux. It's unbelievable that in 2018 just logging into a Windows box will make it go batshit insane and require multiple reboots before it settles down. It's these times I really appreciate apt/dnf/yum etc.