我目前在 MacBook Pro Retina 10,1 15"（2103 年初）上运行 Debian/Jessie。一切都很顺利（以太网、WiFi、视网膜等），但我担心它的功耗。
笔记本电脑模式管理我所有设备的自动电源管理，powertop 的所有可调参数都是好的我的 i7 正在运行节能模式。独立的 Nvidia 显卡甚至没有运行（Bumblebee/bbswitch 将其关闭，因为我不需要它）。所有蓝牙、读卡器和其他东西都被禁用。
但是，powertop 报告以下内容无 X11，键盘和屏幕亮度设置为 0，所有设备均已关闭:
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
手动求和得出的值低得离谱，但 powertop 仍然报告消耗 15W。
然而，在 X11 中以交互模式运行 powertop 给了我更合理的值：
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.)
什么？我的视网膜显示屏功耗 20W？决不！ （实际上，亮度为 50% 时，功率约为 15W，即巨大的）。此外，有时 Apple 内置键盘的功耗为 5 W。
这甚至不是 powertop 中的错误，因为我的电池确实放电得非常快（比如充满电且仅运行 X11 时需要 2 小时 30 秒）。
- 你们知道我的问题是什么吗？我在其他网站上看到一些MBPr用户报告功耗为10W，甚至更低
- 为什么“电池放电率报告”和“系统基线功率”之间存在如此巨大的差异？
- 我的屏幕和键盘使用这么多电量正常吗？
我正在运行 3.10-3-amd64 库存内核。