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I have a Lenovo thinkpad e530 laptop. some device have 100% usage in it. The results of powertop are in below:

Usage     Device name
         10.8%        CPU use
        **100.0%        Audio codec hwC0D0: Conexant
        100.0%        Audio codec hwC0D3: Intel**
         40.0%        Display backlight
         11.0%        Display backlight
        206.2 pkts/s  Network interface: eth0 (r8169)
        162.6 pkts/s  nic:ppp0
        **100.0%        PCI Device: Intel Corporation Ivy Bridge DRAM Controller
        100.0%        PCI Device: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller
        100.0%        PCI Device: Intel Corporation Panther Point High Definition Audio Controller
        100.0%        PCI Device: Intel Corporation Panther Point PCI Express Root Port 1
        100.0%        PCI Device: Intel Corporation Panther Point MEI Controller #1
        100.0%        PCI Device: Intel Corporation Ivy Bridge Graphics Controller
        100.0%        USB device: EHCI Host Controller
        100.0%        USB Device: usb-device-8087-0024
        100.0%        PCI Device: Intel Corporation Panther Point PCI Express Root Port 2
        100.0%        PCI Device: Intel Corporation Panther Point USB Enhanced Host Controller #2
        100.0%        PCI Device: Intel Corporation Panther Point PCI Express Root Port 4
        100.0%        PCI Device: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller
        100.0%        PCI Device: Intel Corporation Ivy Bridge PCI Express Root Port
        100.0%        PCI Device: Intel Corporation Panther Point PCI Express Root Port 3
        100.0%        PCI Device: Intel Corporation Panther Point USB xHCI Host Controller
        100.0%        PCI Device: Intel Corporation Panther Point 6 port SATA Controller [AHCI mode]
        100.0%        USB device: TouchStrip Fingerprint Sensor       (UPEK)
        100.0%        PCI Device: Intel Corporation Panther Point USB Enhanced Host Controller #1
        100.0%        USB device: USB Optical Mouse**
          0.0 pkts/s  Network interface: wlan0 (brcmsmac)
          0.0 rpm     Laptop fan
          0.0%        Radio device: thinkpad_acpi
          0.0%        Radio device: brcmsmac
          0.0%        USB device: Integrated Camera (C6JC9FCAV)
          0.0%        USB Device: usb-device-8087-0024
          0.0%        USB device: xHCI Host Controller
          0.0%        USB device: xHCI Host Controller
          0.0%        USB device: EHCI Host Controller

How can I solve this problem?

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1 Answer 1

up vote 0 down vote accepted

This just means that you have all those devices enabled. So, it says that it's active 100% of the time and this is not a problem (on the contrary, it's a good thing).

In fact you should see man powertop to see what exactly is the purpose of this command. And see How to tweak Powertop to reduce power consumption? in this sense.

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Thanks Radu Rădeanu for your answer. But I have two question: 1- Some device don't have 100% usage (Like "Display backlight" by 40% uage). What is mean it? 2- Some device have 0% usage. How can I enable those? –  secprog Jul 31 '13 at 13:23
    
@secprog Well, "Display backlight" is not a device, is more likely a property of the display. Some other devices you don't use in this moment; for example, open your camera and you will see that the value attached to "USB device: Integrated Camera (C6JC9FCAV)" will change. –  Radu Rădeanu Jul 31 '13 at 13:31
    
OK, I thought that is a bug when usage of device be 100% so it's a wrong. I have jut a problem and it's the high temperature of laptop. How can I reduce it? –  secprog Jul 31 '13 at 14:08
    
@secprog If the answer was useful, you should accept it. If you have other question, use Ask Question buttton. This post can be useful for you, relating to your new question: askubuntu.com/questions/291496/ubuntu-13-04-high-temperature –  Radu Rădeanu Jul 31 '13 at 14:13
    
@secprog Also I gave you a useful link in this sense in the answer. –  Radu Rădeanu Jul 31 '13 at 14:14

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