MacBook Pro Retina: huge power consumption

I'm currently running Debian/Jessie on a MacBook Pro Retina 10,1 15" (early-2103). Everything is going well (ethernet, WiFi, retina, etc.) but I worry about its power consumption. laptop-mode manages the automatic power management of all my devices, all the tunables of powertop are _Good_ and my i7 is running in *powersave* mode. The dicrete Nvidia video card isn't even running (Bumblebee/bbswitch turns it off as I don't need it). All bluetooth, card reader and stuff are disabled. However, powertop reports the following with **no X11, keyboard and screen brightness set to 0 and all devices powered off**: The battery reports a discharge rate of 15.7 W System baseline power is estimated at 15.0 W Power est. Usage Device name 692 mW 0.3% CPU core 484 mW 29.9% Display backlight 299 mW 0.3% CPU misc 264 mW 0.0 ops/s GPU core 0 mW 32.9% USB device: EHCI Host Controller 0 mW 22.9% USB device: usb-device-8087-0024 0 mW 12.8% USB device: usb-device-0424-2512 0 mW 2.7% USB device: Apple Internal Keyboard / Trackpad (Apple Inc.) 0 mW 0.0% Audio codec hwC0D0: Cirrus Logic 0 mW 0.0% Display backlight 0 mW 0.0% USB device: usb-device-8087-0024 0 mW 0.0% USB device: xHCI Host Controller 0 mW 0.0% USB device: xHCI Host Controller 0 mW 0.0% USB device: EHCI Host Controller 0 mW 0.0% USB device: BRCM20702 Hub (Apple Inc.) 0 mW 0.0% USB device: usb-device-05ac-820a 0 mW 0.0% USB device: usb-device-05ac-820b 0 mW 0.0% USB device: Bluetooth USB Host Controller (Apple Inc.) 0 mW 0.0 ops/s GPU misc 0 mW 0.0% USB device: FaceTime HD Camera (Built-in) (Apple Inc.) 100.0% PCI Device: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 100.0% PCI Device: Intel Corporation 3rd Gen Core processor Graphics Controller 100.0% PCI Device: Broadcom Corporation NetXtreme BCM57765 Memory Card Reader 100.0% PCI Device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller 100.0% PCI Device: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port 100.0% PCI Device: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port 100.0% PCI Device: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port 100.0% PCI Device: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] 100.0% PCI Device: Intel Corporation HM77 Express Chipset LPC Controller 100.0% PCI Device: NVIDIA Corporation GK107 HDMI Audio Controller 100.0% PCI Device: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 100.0% PCI Device: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 33.0% PCI Device: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 0.0% PCI Device: Broadcom Corporation Device 16a3 0.0% PCI Device: Broadcom Corporation BCM4331 802.11a/b/g/n 0.0% PCI Device: NVIDIA Corporation GK107M [GeForce GT 650M Mac Edition] 0.0% PCI Device: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller 0.0% PCI Device: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 0.0% PCI Device: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller 0.0% PCI Device: Intel Corporation 3rd Gen Core processor DRAM Controller Manually doing the sum gives a ridiculously low value, but powertop stills report a 15W consumption. However, running powertop in interactive mode in X11 gives me more plausible values: The battery reports a discharge rate of 29.0 W System baseline power is estimated at 16.4 W Power est. Usage Device name 12.3 W 100.0% Display backlight 8.01 W 29.9% Display backlight 4.61 W 19.4% CPU core 3.78 W 419.6 ops/s GPU misc 3.12 W 4.3 pkts/s Network interface: wlan0 (b43) 2.76 W 19.4% CPU misc 1.35 W 419.6 ops/s GPU core 188 mW 100.0% USB device: Apple Internal Keyboard / Trackpad (Apple Inc.) What? My retina display is consuming 20W? No way! (actually, with a 50% brightness it gives like 15W, which is *huge*). Also, sometimes the Apple Internal Keyboard is consuming 5 W. It's not even a bug in powertop since my battery is indeed discarging very fast (like 2h30 when fully charged with only X11 running). - Do you guys have an idea of what my problem is? I saw on other sites that some MBPr users report 10 W power consumption, or even less - Why is there this huge difference between the "battery discharge rate report" and the "system baseline power"? - Is that normal that my Screen and Keyboard use that much power? I'm running a 3.10-3-amd64 stock kernel.