我是 ubuntu 新手，使用 12.04LTS。请逐步帮助我。谢谢大家。
anoy@ubuntu:~$ cat /proc/sys/vm/laptop_mode
5
PowerTOP 1.97 概览 空闲统计 频率统计 设备统计 可调参数
电池报告的放电率为 21.7 W
摘要：每秒 551.2 次唤醒、每秒 0.0 次 GPU 操作和每秒 0.0 次 VFS 操作
Usage Events/s Category Description
43.7 ms/s 229.1 Process /usr/lib/firefox-trunk/fi
17.0 ms/s 109.0 Process /usr/bin/X :0 -auth /var/
2.1 ms/s 42.7 Timer tick_sched_timer
4.2 ms/s 35.5 Process metacity
1.1 ms/s 34.9 Timer hrtimer_wakeup
184.2 ms/s 16.9 Process [loop0]
1.4 ms/s 16.1 Interrupt [44] i915
1.5 ms/s 8.4 Interrupt [16] ehci_hcd:usb1
2.7 ms/s 6.7 Process /usr/bin/ibus-daemon --xi
585.4 ms/s 7.4 Interrupt [7] sched(softirq)
289.0 ms/s 6.2 Process mount.ntfs /dev/disk/by-uuid
1.4 ms/s 5.5 Process /usr/lib/bamf/bamfdaemon
2.0 ms/s 5.2 Process gnome-terminal
1.6 ms/s 3.6 Process unity-2d-shell
0.8 ms/s 2.9 Process unity-2d-panel
7.1 ms/s 0.1 kWork ieee80211_scan_work
0.8 ms/s 2.5 Process //bin/dbus-daemon --fork
61.4 ms/s 2.5 Process [ktpacpi_nvramd]
382.4 ms/s 2.1 Process /usr/lib/gnome-settings-daem
193.2 ms/s 2.0 Interrupt [4] block(softirq)
2.2 ms/s 0.9 Process /usr/bin/python /usr/shar
317.0 ms/s 1.5 Process /usr/lib/at-spi2-core/at-spi
4.0 ms/s 0.0 Process [kworker/u:2]
168.6 ms/s 1.0 Process /bin/dbus-daemon --config-fi
42.7 ms/s 0.8 kWork ieee80211_iface_work
41.7 ms/s 0.8 Process /usr/lib/gvfs/gvfs-afc-volum
5.0 ms/s 0.8 kWork cfq_kick_queue
212.1 ms/s 0.7 Interrupt [9] RCU(softirq)
313.1 ms/s 0.3 Process /usr/lib/unity/unity-panel-s
9.6 ms/s 0.4 kWork i915_gem_retire_work_handler
电池报告的放电率为 18.7 W
Usage Device name
8.8% CPU use
73.3% Display backlight
73.3% Display backlight
29.8% Display backlight
100.0% PCI Device: Intel Corporation 6 Series/C200 Series Chi
100.0% PCI Device: Intel Corporation 6 Series/C200 Series Chi
100.0% PCI Device: Intel Corporation 6 Series/C200 Series Chi
100.0% PCI Device: Intel Corporation 6 Series/C200 Series Chi
100.0% PCI Device: Intel Corporation 6 Series/C200 Series Chi
100.0% PCI Device: Intel Corporation 6 Series/C200 Series Chi
100.0% PCI Device: Intel Corporation 6 Series/C200 Series Chi
100.0% PCI Device: Intel Corporation 6 Series/C200 Series Chi
100.0% PCI Device: Intel Corporation 6 Series/C200 Series Chi
100.0% PCI Device: Intel Corporation 2nd Generation Core Proc
100.0% PCI Device: Realtek Semiconductor Co., Ltd. RTL8188CE
100.0% USB Device: usb-device-04b3-3107
100.0% PCI Device: Realtek Semiconductor Co., Ltd. RTL8111/81
100.0% USB device: EHCI Host Controller
100.0% PCI Device: Advanced Micro Devices [AMD] nee ATI Seymo
100.0% PCI Device: Ricoh Co Ltd Device e823
100.0% PCI Device: Intel Corporation Xeon E3-1200/2nd Generat
100.0% PCI Device: Intel Corporation 2nd Generation Core Proc
100.0% Radio device: rtl8192ce
100.0% USB Device: usb-device-8087-0024
100.0% PCI Device: Intel Corporation 6 Series/C200 Series Chi
71.1 pkts/s Network interface: wlan0 (rtl8192ce)
0.0 pkts/s Network interface: eth0 (r8169)
0.0 rpm Laptop fan
0.0% Radio device: thinkpad_acpi
0.0% Audio codec hwC0D0: Conexant
0.0% Audio codec hwC0D3: Intel
可调参数
Bad Enable SATA link power management for /dev/sda<br/>
Bad NMI watchdog should be turned off<br/>
Bad VM writeback timeout<br/>
Bad Autosuspend for unknown USB device 1-1.3 (04b3:3107)<br/>
Bad Runtime PM for PCI Device Intel Corporation 6 Series/C200 Series Chipset Family PCI<br/>
Bad Runtime PM for PCI Device Intel Corporation 2nd Generation Core Processor Family Int<br/>
Bad Runtime PM for PCI Device Intel Corporation 6 Series/C200 Series Chipset Family MEI<br/>
Bad Runtime PM for PCI Device Intel Corporation 6 Series/C200 Series Chipset Family USB<br/>
Bad Runtime PM for PCI Device Intel Corporation 6 Series/C200 Series Chipset Family PCI<br/>
Bad Runtime PM for PCI Device Intel Corporation 6 Series/C200 Series Chipset Family PCI<br/>
Bad Runtime PM for PCI Device Intel Corporation 6 Series/C200 Series Chipset Family PCI<br/>
Bad Runtime PM for PCI Device Intel Corporation 6 Series/C200 Series Chipset Family 6 po<br/>
Bad Runtime PM for PCI Device Advanced Micro Devices [AMD] nee ATI Seymour [Radeon HD 64<br/>
Bad Runtime PM for PCI Device Intel Corporation Xeon E3-1200/2nd Generation Core Process<br/>
Bad Runtime PM for PCI Device Intel Corporation 6 Series/C200 Series Chipset Family PCI<br/>
Bad Runtime PM for PCI Device Intel Corporation 6 Series/C200 Series Chipset Family USB<br/>
Good Enable Audio codec power management<br/>
Good Power Aware CPU scheduler<br/>
Good Autosuspend for USB device EHCI Host Controller [usb1]<br/>
Good Autosuspend for unknown USB device 2-1 (8087:0024)<br/>
Good Autosuspend for USB device Integrated Camera (Ricoh Company Ltd.)<br/>
Good Autosuspend for USB device EHCI Host Controller [usb2]<br/>
Good Autosuspend for unknown USB device 1-1 (8087:0024)<br/>
Good Runtime PM for PCI Device Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi<br/>
Good Runtime PM for PCI Device Intel Corporation 6 Series/C200 Series Chipset Family High<br/>
Good Runtime PM for PCI Device Ricoh Co Ltd Device e823<br/>
Good Runtime PM for PCI Device Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express<br/>
Good Runtime PM for PCI Device Intel Corporation 2nd Generation Core Processor Family DRA<br/>
Good Wake-on-lan status for device eth0<br/>
Good Wake-on-lan status for device wlan0<br/>
Good Using 'ondemand' cpufreq governor<br/>
答案1
我对各种机器上的 Precise 12.04 LTS 进行了良好/不良 powertop 设置测试。我的研究结果如下：
http://kernel.ubuntu.com/~cking/power-benchmarking/powertop-good-bad-recommendations/results.txt
..以及此处的支持数据：
我们在 Precise 中的 pm-utils 包中添加了最佳且风险最小的更改，以帮助节省笔记本电脑的电池电量。
通过使用高精度万用表，很明显 powertop 的一些“好的”节能建议实际上可能并不是那么有用，因此需要大量的反复试验和准确的功耗评估方法，以确保为您的硬件选择最佳配置。
如果您想了解有关 Precise 在节能方面的更多工作，请参阅：https://wiki.ubuntu.com/Kernel/PowerManagement