"It works perfectly" statements are invariably false.
For starters, Bluetooth has been broken on Linux until recent times (a couple of years, probably, maybe less), because of the piece of crap that Bluez is. In some Ubuntu distros, Bluetooth may still have some broken functionality (I remember examining the configfiles).
Ubuntu's hibernation was broken last time I've checked, because the setup was setting a 2 GiB swapfile, which is not enough for the RAM of modern machines. My last installation, last week, still set the same size.
For starters, Bluetooth has been broken on Linux until recent times (a couple of years, probably, maybe less), because of the piece of crap that Bluez is. In some Ubuntu distros, Bluetooth may still have some broken functionality (I remember examining the configfiles).
Ubuntu's hibernation was broken last time I've checked, because the setup was setting a 2 GiB swapfile, which is not enough for the RAM of modern machines. My last installation, last week, still set the same size.
So there you go.