From Fedora Project Wiki

Revision as of 23:40, 19 March 2011 by Jskarvad (talk | contribs)

Description

This test case tests the PowerTOP 2.x power estimation engine.

This test targets laptop users. Running this test can take one hour or more, but most of this test can be run in background enabling the user to use her/his computer for other tasks. If you do not have laptop or if you do not have enough time feel free to skip this test. In this case please leave the corresponding column in the results table blank.

Setup

  1. Check that you have powertop >= 1.97 installed: 
    $ rpm -q powertop
    • If not install it:
    # yum install powertop

The calibration process could be affected by other power savings mechanisms. The PowerTOP can control brightness and wireless devices, thus we need to disable screensaver, screen dimming/turning off, transition to sleep mode, HDD power savings and cron service. Generic step-by-step instructions follows, please change them according to your configuration.

  1. Disable screensaver (if applicable).
  2. Disable sleep mode, in Gnome 3: 
    $ gnome-control-center power
    • Uncheck "On battery power"
  3. Disable LCD power savings, in Gnome 3: 
    $ gnome-control-center screen
    • Uncheck "Dim screen to save power".
    • Set "Turn off after" to max. value.
  4. Disable HDD power savings: 
    # hdparm -B 255 /dev/sda || hdparm -B 254 /dev/sda
  5. Disable cron: 
    # service crond stop

How to test

  1. Disconnect AC and run on battery.
  2. Start calibration by: 
    # powertop --calibrate
    • During the calibration process the PowerTOP will change various settings of your system including the LCD backlight, let it run. It will take approx. 10 minutes. Do not use your computer while calibrating. After the calibration the PowerTOP will start automatically.
  3. Let the PowerTOP run to collect enough data. You can let it run in the background and simultaneously work with your computer as usual. In active idle the collection process can take 1 hour or more. After enough data are collected, the PowerTOP will start showing the estimation of power consumption for each item.

Expected Results

  1. PowerTOP successfully collects calibration data.
  2. Power consumption estimation starts showing for each item in the first column.
Retrieved from "https://fedoraproject.org/w/index.php?title=QA:Testcase_Power_Management_powertop2_power_estimation_engine&oldid=227857"