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#1 2018-04-15 18:26:30

benfl
Member
Registered: 2018-04-15
Posts: 4

[Solved] Battery status "unknown" when ThinkPad plugged in

Hi, I'm having some issues with charging my Lenovo ThinkPad 11E. When it is plugged in, it doesn't charge:

$ acpi -i
Battery 0: Unknown, 97%
Battery 0: design capacity 4151 mAh, last full capacity 3439 mAh = 82%

The battery level doesn't go up or down. I guess this means that the computer is using power from the AC adapter, but not using it to charge the battery.

When unplugged, it works as expected (except for being slightly optimistic about the remaining time, but it gets better after a minute or so).

$ acpi -i
Battery 0: Discharging, 97%, 10:11:27 remaining
Battery 0: design capacity 4185 mAh, last full capacity 3467 mAh = 82%

If I let it discharge for a bit and then plug it back in, it stays at the new level of charge, so I don't think it's a question of something misreporting the maximum capacity for the battery.

I have gotten the computer to charge by booting Lubuntu from a live usb, unplugging and plugging in the computer a few times until it starts charging, and then rebooting back into Arch. I would prefer not to do this every time my computer needs charging smile

Up until two days ago, I was running Ubuntu on this computer, and charging worked fine, so if it is a hardware failure it coincided perfectly with installing Arch.

Here is some stuff that could be useful.

$ uname -r
4.15.15-1-ARCH
$ upower -e
/org/freedesktop/UPower/devices/line_power_ACAD
/org/freedesktop/UPower/devices/battery_BAT1
/org/freedesktop/UPower/devices/DisplayDevice
$ upower -i /org/freedesktop/UPower/devices/line_power_ACAD
  native-path:          ACAD
  power supply:         yes
  updated:              Sun 15 Apr 2018 10:53:32 AM PDT (31 seconds ago)
  has history:          no
  has statistics:       no
  line-power
    warning-level:       none
    online:              yes
    icon-name:          'ac-adapter-symbolic'
$ upower -i /org/freedesktop/UPower/devices/battery_BAT1
  native-path:          BAT1
  vendor:               LGC
  model:                45N1749
  serial:               2763
  power supply:         yes
  updated:              Sun 15 Apr 2018 10:53:36 AM PDT (71 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               fully-charged
    warning-level:       none
    energy:              27.12 Wh
    energy-empty:        0 Wh
    energy-full:         28.2 Wh
    energy-full-design:  34.04 Wh
    energy-rate:         0 W
    voltage:             8.182 V
    percentage:          96%
    capacity:            82.8437%
    technology:          lithium-polymer
    icon-name:          'battery-full-charged-symbolic'
  History (charge):
    1523814813  96.000  fully-charged

Also, here is some output from dmesg.

This is my first time asking a question here, so let me know if there's any more information I could provide. I didn't know whether to post here or in the Newbie section; I hope this is OK. Thanks for any help!

Last edited by benfl (2018-04-18 22:13:14)

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#2 2018-04-18 22:12:59

benfl
Member
Registered: 2018-04-15
Posts: 4

Re: [Solved] Battery status "unknown" when ThinkPad plugged in

OK, it seems like there wasn't a problem. If I let the battery discharge more and then plug the adapter in, it will start charging. That's good enough for me! It seems like a lot of people want this functionality, so I guess I should be happy.

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