There is a standardized way you can tell devices to go to sleep or hibernate. This is implemented by the firmware core. The people who write that firmware code

There is a standardized way you can tell devices to go to sleep or hibernate. This is implemented by the firmware core. The people who write that firmware code test a lot to make sure it works when the device is programmed the way Windows programs it. If Linux turns out to use the device in a different way the procedure is untested and often this firmware is very buggy which is why it isn’t reliable.