Description of problem Powertop doesn't calibrate and give this error ; Cannot load from file /var/cache/powertop/saved_parameters.powertop All Calibrate Result ; Cannot load from file /var/cache/powertop/saved_results.powertop Cannot load from file /var/cache/powertop/saved_parameters.powertop Starting PowerTOP power estimate calibration Calibrating idle Calibrating: disk usage Calibrating backlight .... device /sys/class/backlight/intel_backlight/brightness .... device /sys/class/backlight/acpi_video0/brightness .... device /sys/class/backlight/acpi_video1/brightness .... device /sys/class/backlight/acpi_video2/brightness Calibrating idle Calibrating: CPU usage on 1 threads Calibrating: CPU usage on 4 threads Calibrating: CPU wakeup power consumption Calibrating: CPU wakeup power consumption Calibrating: CPU wakeup power consumption Calibrating USB devices .... device /sys/bus/usb/devices/usb1/power/control .... device /sys/bus/usb/devices/usb2/power/control .... device /sys/bus/usb/devices/1-1/power/control .... device /sys/bus/usb/devices/2-1/power/control .... device /sys/bus/usb/devices/1-1.3/power/control .... device /sys/bus/usb/devices/1-1.4/power/control .... device /sys/bus/usb/devices/2-1.5/power/control Calibrating radio devices .... device /sys/class/rfkill/rfkill0/soft .... device /sys/class/rfkill/rfkill1/soft .... device /sys/class/rfkill/rfkill2/soft .... device /sys/class/rfkill/rfkill0/soft .... device /sys/class/rfkill/rfkill1/soft .... device /sys/class/rfkill/rfkill2/soft Finishing PowerTOP power estimate calibration Parameters after calibration: Parameter state ---------------------------------- Value Name 0.50 alsa-codec-power (14) 0.00 backlight (4) 0.00 backlight-boost-100 (8) 0.00 backlight-boost-40 (6) 0.00 backlight-boost-80 (7) 0.00 backlight-power (5) 100.00 base power (45) 1.56 cpu-consumption (3) 39.50 cpu-wakeups (2) 0.00 disk-operations (48) 0.20 disk-operations-hard (47) 0.56 gpu-operations (46) 0.00 p1p1-link-100 (20) 0.00 p1p1-link-1000 (21) 0.00 p1p1-link-high (22) 0.00 p1p1-packets (23) 0.00 p1p1-powerunsave (19) 0.00 p1p1-up (18) 0.00 radio:hci0 (17) 0.00 radio:hp-wifi (15) 0.00 radio:phy0 (16) 0.00 runtime-0000:00:00.0 (30) 0.00 runtime-0000:00:01.0 (31) 0.00 runtime-0000:00:02.0 (32) 0.00 runtime-0000:00:1a.0 (33) 0.00 runtime-0000:00:1b.0 (34) 0.00 runtime-0000:00:1c.0 (35) 0.00 runtime-0000:00:1c.1 (36) 0.00 runtime-0000:00:1d.0 (37) 0.00 runtime-0000:00:1f.2 (38) 0.00 runtime-0000:00:1f.3 (39) 0.00 runtime-0000:00:1f.6 (40) 0.00 runtime-0000:01:00.0 (41) 0.00 runtime-0000:01:00.1 (42) 0.00 runtime-0000:02:00.0 (43) 0.00 runtime-0000:03:00.0 (44) 0.10 usb-device-0408-03b2 (13) 0.10 usb-device-046d-c526 (12) 0.10 usb-device-148f-1000 (11) 0.10 usb-device-1d6b-0002 (9) 0.10 usb-device-8087-0020 (10) 0.00 wlan0-link-100 (26) 0.00 wlan0-link-1000 (27) 0.00 wlan0-link-high (28) 0.00 wlan0-packets (29) 0.00 wlan0-powerunsave (25) 0.00 wlan0-up (24) Score: 0.0 ( 0.0) Guess: 104.1 Actual: 0.0 ---------------------------------- Leaving PowerTOP Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1.su 2.powertop --calibrate, 3.give error result Actual results: Give error Cannot load from file /var/cache/powertop/saved_parameters.powertop Expected results: Powertop has calibrate machine Additional info:
AFAIK you need to run it for a while (approx. one hour) to collect enough data. Regarding the error message there was bug 698020.
Thank you , According to you first I will update to powertop from testing repo and calibrate again.
After calibration let it run for a while on battery (according to my tests approx. one hour) and it will show wattage estimation for each process / device. Then, if you exit, the estimation engine will save its state. I think this together with the above mentioned update should resolve your problem. If the problem persists, please let me know. *** This bug has been marked as a duplicate of bug 698020 ***