Many laptop makers started to intentionally disable S3 for the "enhanced" S2. This was/is true of Lenovo as well: for roughly 6 months S3 was disabled completely on the then-new 3rd generation Yoga X1 laptops and Carbon counterparts. It was re-enabled thanks to linux user's uproar under the "legacy sleep mode" umbrella.
Why would you go as far as disabling it, is beyond me. S3 is the sleep mode I expect on a laptop. S2 sounds useful for tablet/phone behavior.
Hibernation doesn't of course suffer from this issue, and I never experienced this on any laptop with S3 sleep.
Of course, if you shut down your laptop and put it immediately in a bag, temperature will raise temporarily even if the system is off due to the inability to dissipate heat. You should be aware of this, and avoid immediately bagging the laptop just after rebuilding the kernel ;)
It's not like the laptop generates any heat once you turn it off. It's more like its not vented out and is absorbed by other components that normally do not get warm. The total heat is not any greater.
Many laptop makers started to intentionally disable S3 for the "enhanced" S2. This was/is true of Lenovo as well: for roughly 6 months S3 was disabled completely on the then-new 3rd generation Yoga X1 laptops and Carbon counterparts. It was re-enabled thanks to linux user's uproar under the "legacy sleep mode" umbrella.
Why would you go as far as disabling it, is beyond me. S3 is the sleep mode I expect on a laptop. S2 sounds useful for tablet/phone behavior.
Hibernation doesn't of course suffer from this issue, and I never experienced this on any laptop with S3 sleep.
Of course, if you shut down your laptop and put it immediately in a bag, temperature will raise temporarily even if the system is off due to the inability to dissipate heat. You should be aware of this, and avoid immediately bagging the laptop just after rebuilding the kernel ;)