This test case tests the PowerTOP 2.x power estimation engine.
- Check that you have pm-test-day package installed:
$ rpm -q pm-test-day
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 and cron service:
- Disable screensaver (if applicable).
- Disable sleep mode, in Gnome 3:
$ gnome-control-center power
- Uncheck "On battery power"
- Disable LCD power savings, in Gnome 3:
$ gnome-control-center screen
- Uncheck "Dim screen to save power".
- Set "Turn off after" to max. value.
- Disable cron:
# service crond stop
- Disable user PM via gconf (and save previous settings), it needs to be run under user who is logged into desktop:
$ pmtd-pm-user-settings saveoff
- After the test it is possible to restore the previous settings by using the restore parameter instead of saveoff.
How to test
- Disconnect AC and run on battery.
- 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.
- Let the PowerTOP collect enough data. You can let it run in the background and simultaneously work with your computer as usual. 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 (process, device) in the first column (Overview and Device stats. tabs).
- PowerTOP successfully collects calibration data.
- Power consumption estimation starts showing for each item in the first column.