The battery indicator& Power setting panel shows wrong battery state
Solution 1
Here are no problem it seems.
Soon, power consumption counted by Windows do not point actual state, because Windows is hungry and forced "to be a bit wrong" to user. It's my very subjective opinion.
Hovewer, it is very relativistic question due to very relative nature of an ACTUAL STATE term.
A very many ways exist to explain why for Windows 60% is actual but EQUAL for actuals Ubuntu 82%'s. Most simple is about differences between Windows and Ubuntu paradigms.
update 1
Try to test your environment with fwts :
sudo add-apt-repository ppa:firmware-testing-team/ppa-fwts-stable
sudo apt-get update
sudo apt-get install fwts
Read: wiki.ubuntu.com/Kernel/Reference/fwts
update 2
Thus battery.log shows that power ACPI interface disabled.
It means you have first solution for your problem by enabling power interface in BIOS.
Or if this behavior initiated by boot-parameter you need to find correct value.
update 3
Obviously booting parametrization have weight here.
New readings based on updates: UEFIBooting
Most actual parameters (WARNING! Use only correct parameters referred to your config) :
acpi
noefi
acpi_osi
apm
Kernel boot parameters Documentation
update 4
Also you can try to test output parameters with acpi program:
sudo apt-get install acpi
acpi -V
Finally all my web surf point to: ThinkPad ACPI Extras Driver
And: Lenovo Diagnostics (Linux Bootable CD).
Solution 2
Can you run the following command and put the output into your question:
cat /sys/class/power_supply/BAT0/uevent
This should contain info such as the POWER_SUPPLY_ENERGY_FULL_DESIGN, POWER_SUPPLY_ENERGY_FULL and POWER_SUPPLY_ENERGY_NOW which will give us a more informed answer to your issue.
[Updated]
So your machine is reporting:
POWER_SUPPLY_ENERGY_FULL_DESIGN=31680000
POWER_SUPPLY_ENERGY_FULL=22050000
..these two fields are static data from the ACPI _BIX control. The first is the design capacity of the battery, the second is the predicted battery capacity when fully charged.
POWER_SUPPLY_ENERGY_NOW=17860000
..and this is from the ACPI _BST control, showing you the current battery charge. This is dynamic and will change.
This data is typically read from the Embedded Controller that talks to the smart battery usually over the i2c bus. This data is presented to the kernel via the APCI controls so this data is basically what the kernel is given, it has no control over this data but to present it directly to user space applications.
These current values show that the battery when last fully charged got to 69.6% of full battery design capacity. Also your current capacity is about 80% of the full charge capacity and 56.3% of the theoretical design capacity of the battery.
My guess is that the user space apps are showing you the battery capacity in percentage terms of the full charge capacity. Maybe windows is showing you the figures in terms of the battery design capacity. Just a guess.
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Comments
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Eastsun over 1 year
My laptop is Thinkpad E420 with Ubuntu 12.04 64-bit installed, the kernel version is 3.2.0-33-generic. I have set the battery threshold as 60% via windows7. It seems that the threshold auto effected in Ubuntu. However, there are some problems of the battery indicator's state.
I'll list some information of the battery state as following: (Note that in terminal ubuntu says that battery charging state is charged, while the power setting panel shows that the battery state is charging as well as the battery indicator shows.)
$ cat /proc/acpi/battery/BAT0/state present: yes capacity state: ok *charging state: charged* present rate: 0 mW remaining capacity: 18200 mWh present voltage: 16103 mV
battery indicator state
Power Setting Panel
Is there any way to fix the problem?
Edit Add some result via **sudo fwts battery - > battery.log **
3 passed, 4 failed, 0 warnings, 0 aborted, 0 skipped, 0 info only. Test Failure Summary =============================== Critical failures: NONE High failures: 2 battery: Did not detect any ACPI battery events. battery: Could not detect ACPI events for battery BAT0. Medium failures: 1 battery: Battery BAT0 claims it's charging but no charge is added Low failures: 1 battery: System firmware may not support cycle count interface or it reports it incorrectly for battery BAT0. Other failures: NONE Test |Pass |Fail |Abort|Warn |Skip |Info | ---------------+-----+-----+-----+-----+-----+-----+ battery | 3| 4| | | | | ---------------+-----+-----+-----+-----+-----+-----+ Total: | 3| 4| 0| 0| 0| 0| ---------------+-----+-----+-----+-----+-----+-----+
Edit2 According to @Colin Ian King's suggestion, I have run following script.
$ cat /sys/class/power_supply/BAT0/uevent POWER_SUPPLY_NAME=BAT0 POWER_SUPPLY_STATUS=Unknown POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_TECHNOLOGY=Li-ion POWER_SUPPLY_CYCLE_COUNT=0 POWER_SUPPLY_VOLTAGE_MIN_DESIGN=14400000 POWER_SUPPLY_VOLTAGE_NOW=16075000 POWER_SUPPLY_POWER_NOW=0 POWER_SUPPLY_ENERGY_FULL_DESIGN=31680000 POWER_SUPPLY_ENERGY_FULL=22050000 POWER_SUPPLY_ENERGY_NOW=17860000 POWER_SUPPLY_MODEL_NAME=LNV-42T4763 POWER_SUPPLY_MANUFACTURER=SANYO POWER_SUPPLY_SERIAL_NUMBER= 2614
I have taken two photos of the bios in case I have missed something.
The output of
acpi -V
future$ acpi -V Battery 0: Unknown, 89% Battery 0: design capacity 1947 mAh, last full capacity 1339 mAh = 68% Adapter 0: on-line Thermal 0: ok, 31.0 degrees C Thermal 0: trip point 0 switches to mode critical at temperature 120.0 degrees C Cooling 0: LCD 3 of 15 Cooling 1: LCD 3 of 15 Cooling 2: Processor 0 of 10 Cooling 3: Processor 0 of 10 Cooling 4: Processor 0 of 10 Cooling 5: Processor 0 of 10
Any help would be appreciated!
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Eastsun over 11 yearsHi, @swift, my question is not of the percentage of battery, but of the battery state. In the terminal, ubuntu says that the battery state is charged, while in the power setting panel, it shows that the battery is charging as well as the indicator shows.
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swift over 11 yearsPerhaps your OS installation has disabled ACPI feature. Read: Battery
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Eastsun over 11 yearsThanks swift. I have done following your suggestion and got some information.
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swift over 11 yearsSolving both high failures can resolve the trouble. If ACPI disabled by BIOS just enable it. Or if it boot-parameter need to find more correct value.
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swift over 11 yearsElse, medium failure shows that charging state can be read without solving of high failures, but need solve it because other solution have point at installation of additional software.
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Eastsun over 11 yearsThere is no option for ACPI(Advanced Configuration and Power Management Interface) in the bios. But I do have installed a ACPI driver via WIN7 (of the same laptop).
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Eastsun over 11 yearsThanks for your suggestion, I have edited the question to add the information.
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swift over 11 yearsInstalling some ACPI driver via Win7 do not affect Ubuntu software environment. You need enable this FEATURE in the BIOS to be SURE that this INTERFACE has active state.
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Eastsun over 11 yearsI see your point. But there is no acpi option in bios. Does it mean the bios of my computer don't support this feature?
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swift over 11 yearsYes, it possible or BIOS outdated. But we can find software )) CHARGING state is possible to reading ... in case that state is possible to be claimed.
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Colin Ian King over 11 yearsI need to interject here. The machine is returning sane looking data from ACPI, see the _BST and _BIX data as returned by cat /sys/class/power_supply/BAT0/uevent. This is not a BIOS issue IMHO.
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swift over 11 yearsbut it seems ACPI mechanism is overridden by templated PM modes. "Battery Optimi...zed?" value can have different meanings by manufacturer. Perhaps some about
acpi=force
can change this behavior. -
Eastsun over 11 yearsTks every one. It seems that this problem is too complicate to work out for me. Since it is not a serious problem, I'll just left it out.
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swift over 11 yearsnice question ... is good point to start