Arch Linux

keiichiiownsu12

Member

Registered: 2019-04-16

Posts: 42

[VivoBook S14] System unable to detect battery state

Addendum: The issue occurred 2-4 hours prior to creating this post.

Dealing with a similar issue as posted here.
Laptop model # is S410UN-NS74 , if that helps.

Basically, the system is unable to detect battery status or charge level.
cat-ing /sys/class/power_supply/BAT0/status gives:

$cat /sys/class/power_supply/BAT0/status
Unknown

Tools like acpi and upower are also unable to detect the current battery state.

The computer does not turn off when I unplug the AC charger, so it should not be a hardware issue.
Running "udevadm monitor --property" and unplugging the machine yields:

$udevadm monitor --property
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[1787.447634] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/ACPI0003:00/power_supply/AC0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/ACPI0003:00/power_supply/AC0
SUBSYSTEM=power_supply
POWER_SUPPLY_NAME=AC0
POWER_SUPPLY_TYPE=Mains
POWER_SUPPLY_ONLINE=0
SEQNUM=3866

KERNEL[1787.579938] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/PNP0C0A:03/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/PNP0C0A:03/power_supply/BAT0
SUBSYSTEM=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Unknown
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Unknown
POWER_SUPPLY_CYCLE_COUNT=0
POWER_SUPPLY_MODEL_NAME=
POWER_SUPPLY_MANUFACTURER=
POWER_SUPPLY_SERIAL_NUMBER=
SEQNUM=3867

UDEV  [1788.562016] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/ACPI0003:00/power_supply/AC0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/ACPI0003:00/power_supply/AC0
SUBSYSTEM=power_supply
POWER_SUPPLY_NAME=AC0
POWER_SUPPLY_TYPE=Mains
POWER_SUPPLY_ONLINE=0
SEQNUM=3866
USEC_INITIALIZED=1787458468

UDEV  [1788.671216] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/PNP0C0A:03/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/PNP0C0A:03/power_supply/BAT0
SUBSYSTEM=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Unknown
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Unknown
POWER_SUPPLY_CYCLE_COUNT=0
POWER_SUPPLY_MODEL_NAME=
POWER_SUPPLY_MANUFACTURER=
POWER_SUPPLY_SERIAL_NUMBER=
SEQNUM=3867
USEC_INITIALIZED=1787590983

Plugging the laptop back in yields the additional:

KERNEL[1878.778413] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/ACPI0003:00/power_supply/AC0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/ACPI0003:00/power_supply/AC0
SUBSYSTEM=power_supply
POWER_SUPPLY_NAME=AC0
POWER_SUPPLY_TYPE=Mains
POWER_SUPPLY_ONLINE=1
SEQNUM=3868

UDEV  [1878.829284] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/ACPI0003:00/power_supply/AC0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/ACPI0003:00/power_supply/AC0
SUBSYSTEM=power_supply
POWER_SUPPLY_NAME=AC0
POWER_SUPPLY_TYPE=Mains
POWER_SUPPLY_ONLINE=1
SEQNUM=3868
USEC_INITIALIZED=1878783786

KERNEL[1878.897838] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/PNP0C0A:03/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/PNP0C0A:03/power_supply/BAT0
SUBSYSTEM=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Unknown
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Unknown
POWER_SUPPLY_CYCLE_COUNT=0
POWER_SUPPLY_MODEL_NAME=
POWER_SUPPLY_MANUFACTURER=
POWER_SUPPLY_SERIAL_NUMBER=
SEQNUM=3869

UDEV  [1878.926738] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/PNP0C0A:03/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19/PNP0C09:01/PNP0C0A:03/power_supply/BAT0
SUBSYSTEM=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Unknown
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Unknown
POWER_SUPPLY_CYCLE_COUNT=0
POWER_SUPPLY_MODEL_NAME=
POWER_SUPPLY_MANUFACTURER=
POWER_SUPPLY_SERIAL_NUMBER=
SEQNUM=3869
USEC_INITIALIZED=1878898687

So it seems the system is at least able to detect whether it is on AC or battery power.

Could this potentially be due to a kernel issue? I feel this may be somewhat unlikely, since my last kernel update was on 09/18. Would it be helpful/advisable to post today's entries in /var/log/pacman.log to pastebin?

Last edited by keiichiiownsu12 (2020-09-26 03:51:38)

---

I, uh, nevermind

keiichiiownsu12

Member

Registered: 2019-04-16

Posts: 42

Re: [VivoBook S14] System unable to detect battery state

Update:
Checked on windows: windows is also unable to read the battery status. This seems to be more of a hardware issue, rather than a software one.
Please trash this thread if warranted!

---

I, uh, nevermind