[Lenovo Legion 5 15AKP10 (AMD)] Sometimes reports battery status every 0.5 seconds with an ACPI event

[Iceburgino]

Is your feature request related to a problem? Please describe.

On a new Lenovo Legion 5 15AKP10 (AMD), sometimes the laptop will report battery status every 0.5 seconds with an ACPI event (acpi_listen):

battery PNP0C0A:00 00000080 00000001
battery PNP0C0A:00 00000080 00000001
battery PNP0C0A:00 00000080 00000001
battery PNP0C0A:00 00000080 00000001
battery PNP0C0A:00 00000080 00000001

Which as a consequence, will trigger a udev kernel event (sudo udevadm monitor):

KERNEL[1296.287299] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV  [1296.395084] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[1296.789457] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV  [1296.892868] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[1297.355145] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV  [1297.462055] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[1297.792233] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV  [1297.892774] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[1298.293330] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV  [1298.399272] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)

I checked whether this triggers TLP, and indeed it does. Here's the output of sudo udevadm control --log-priority=debug and sudo journalctl -f

Sep 07 20:55:13 nixos systemd-udevd[7780]: No events are queued, removed /run/udev/queue.
Sep 07 20:55:13 nixos systemd-udevd[7780]: BAT0: Device is queued (SEQNUM=5073, ACTION=change)
Sep 07 20:55:13 nixos systemd-udevd[7780]: BAT0: Device ready for processing (SEQNUM=5073, ACTION=change)
Sep 07 20:55:13 nixos systemd-udevd[7780]: BAT0: sd-device-monitor(manager): Passed 798 byte to netlink monitor.
Sep 07 20:55:13 nixos (udev-worker)[44423]: BAT0: Processing device (SEQNUM=5073, ACTION=change)
Sep 07 20:55:13 nixos (udev-worker)[44423]: BAT0: sd-device: Created database file '/run/udev/data/+power_supply:BAT0' for '/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0'.
Sep 07 20:55:13 nixos (udev-worker)[44423]: BAT0: /nix/store/rp2xd0b2jjbc2gdhc51qsrcnf0mz2wl9-udev-rules/85-tlp.rules:7 RUN '/nix/store/dq5fdsfzs2p4ixvy204a8m8j5fkgf6zv-tlp-1.8.0/sbin/tlp auto'
Sep 07 20:55:13 nixos (udev-worker)[44423]: BAT0: sd-device: Created database file '/run/udev/data/+power_supply:BAT0' for '/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0'.
Sep 07 20:55:13 nixos (udev-worker)[44423]: BAT0: Running command "/nix/store/dq5fdsfzs2p4ixvy204a8m8j5fkgf6zv-tlp-1.8.0/sbin/tlp auto"
Sep 07 20:55:13 nixos (udev-worker)[44423]: BAT0: Starting '/nix/store/dq5fdsfzs2p4ixvy204a8m8j5fkgf6zv-tlp-1.8.0/sbin/tlp auto'
Sep 07 20:55:13 nixos (udev-worker)[44423]: Successfully forked off '(spawn)' as PID 46097.
Sep 07 20:55:13 nixos (udev-worker)[44423]: BAT0: Process '/nix/store/dq5fdsfzs2p4ixvy204a8m8j5fkgf6zv-tlp-1.8.0/sbin/tlp auto' succeeded.
Sep 07 20:55:13 nixos (udev-worker)[44423]: BAT0: sd-device: Created database file '/run/udev/data/+power_supply:BAT0' for '/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0'.
Sep 07 20:55:13 nixos (udev-worker)[44423]: BAT0: Device processed (SEQNUM=5073, ACTION=change)
Sep 07 20:55:13 nixos (udev-worker)[44423]: BAT0: sd-device-monitor(worker): Passed 917 byte to netlink monitor.
Sep 07 20:55:13 nixos systemd-udevd[7780]: No events are queued, removed /run/udev/queue.
Sep 07 20:55:14 nixos systemd-udevd[7780]: BAT0: Device is queued (SEQNUM=5074, ACTION=change)
Sep 07 20:55:14 nixos systemd-udevd[7780]: BAT0: Device ready for processing (SEQNUM=5074, ACTION=change)
Sep 07 20:55:14 nixos systemd-udevd[7780]: BAT0: sd-device-monitor(manager): Passed 798 byte to netlink monitor.
Sep 07 20:55:14 nixos (udev-worker)[44423]: BAT0: Processing device (SEQNUM=5074, ACTION=change)
Sep 07 20:55:14 nixos (udev-worker)[44423]: BAT0: sd-device: Created database file '/run/udev/data/+power_supply:BAT0' for '/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0'.
Sep 07 20:55:14 nixos (udev-worker)[44423]: BAT0: /nix/store/rp2xd0b2jjbc2gdhc51qsrcnf0mz2wl9-udev-rules/85-tlp.rules:7 RUN '/nix/store/dq5fdsfzs2p4ixvy204a8m8j5fkgf6zv-tlp-1.8.0/sbin/tlp auto'
Sep 07 20:55:14 nixos (udev-worker)[44423]: BAT0: sd-device: Created database file '/run/udev/data/+power_supply:BAT0' for '/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0'.
Sep 07 20:55:14 nixos (udev-worker)[44423]: BAT0: Running command "/nix/store/dq5fdsfzs2p4ixvy204a8m8j5fkgf6zv-tlp-1.8.0/sbin/tlp auto"
Sep 07 20:55:14 nixos (udev-worker)[44423]: BAT0: Starting '/nix/store/dq5fdsfzs2p4ixvy204a8m8j5fkgf6zv-tlp-1.8.0/sbin/tlp auto'
Sep 07 20:55:14 nixos (udev-worker)[44423]: Successfully forked off '(spawn)' as PID 46134.
Sep 07 20:55:14 nixos (udev-worker)[44423]: BAT0: Process '/nix/store/dq5fdsfzs2p4ixvy204a8m8j5fkgf6zv-tlp-1.8.0/sbin/tlp auto' succeeded.
Sep 07 20:55:14 nixos (udev-worker)[44423]: BAT0: sd-device: Created database file '/run/udev/data/+power_supply:BAT0' for '/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0'.
Sep 07 20:55:14 nixos (udev-worker)[44423]: BAT0: Device processed (SEQNUM=5074, ACTION=change)
Sep 07 20:55:14 nixos (udev-worker)[44423]: BAT0: sd-device-monitor(worker): Passed 917 byte to netlink monitor.
Sep 07 20:55:14 nixos systemd-udevd[7780]: No events are queued, removed /run/udev/queue.

This causes a little more CPU usage, and the power draw is 2-3 watts more.

Now I think this is a bug in the BIOS, and I already reported it here: https://forums.lenovo.com/t5/Gaming-Laptops/Legion-15AKP10-linux/m-p/10000853

But I also wonder - maybe this is not the event that TLP should rely on to switch the profile? Because there is this one:

ACTION=="change", SUBSYSTEM=="power_supply", KERNEL=="ADP*", RUN+="<command>"

Which, correct me if I am wrong, does almost the same thing. It monitors whether the power adapter is on or off instead of monitoring the battery. It would solve my issue. Would it be a viable way to monitor changes to battery/ac?

Describe the solution you'd like

Replace this:

TLP/tlp.rules.in

Line 7 in 46fe058

ACTION=="change", SUBSYSTEM=="power_supply", KERNEL!="hidpp_battery*", RUN+="@TLP_SBIN@/tlp auto"

with this:

ACTION=="change", SUBSYSTEM=="power_supply", KERNEL=="ADP*", RUN+="@TLP_SBIN@/tlp auto"

Describe alternatives you've considered

My specific problem is probably solvable via a BIOS update. So this is kind of a suggestion/question to potentially improve TLP code as a consequence of my investigation.

Additional context

None

[linrunner]

Hi, thanks for your suggestion.

Unfortunately, neither the devices for batteries nor those for power adapters are named uniformly. The latter is apparently called ADP in your case, while it is called AC in all ThinkPads, for example. There are also broken BIOS implementations where one of the two is missing entirely. The only thing that is actually consistent is the hidpp_battery* scheme, but that is irrelevant here.

Therefore, your customized rule is only suitable as a workaround for your specific case, but not as a general solution.

Please show the output of

sudo tlp-stat -s -b
tlp-stat --psup

and also provide a report of some of the disruptive, useless events every 0.5 seconds with

tlp-stat --pev

[Iceburgino]

That's unfortunate. Would it then be a viable alternative to let one customize the rule? So that if a system is peculiar, the user can make it work without you having to account for every specific of every machine?

Here is the output on my machine:

sudo tlp-stat --pev

--- TLP 1.8.0 --------------------------------------------

+++ Monitor power supply events -- cancel with ^C

monitor will print the received events for:
UDEV - the event which udev sends out after rule processing

UDEV  [9503.946451] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16135000
POWER_SUPPLY_POWER_NOW=10665000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10589
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9504.452034] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16135000
POWER_SUPPLY_POWER_NOW=10665000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10590
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9504.954090] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16135000
POWER_SUPPLY_POWER_NOW=10665000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10591
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9505.462296] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16135000
POWER_SUPPLY_POWER_NOW=10665000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10592
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9506.024243] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16135000
POWER_SUPPLY_POWER_NOW=10649000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10593
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9506.463016] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16135000
POWER_SUPPLY_POWER_NOW=10649000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10594
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9506.968437] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16135000
POWER_SUPPLY_POWER_NOW=10649000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10595
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9507.462500] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16137000
POWER_SUPPLY_POWER_NOW=10650000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10596
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9507.967432] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16137000
POWER_SUPPLY_POWER_NOW=10650000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10597
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9508.531560] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16137000
POWER_SUPPLY_POWER_NOW=10618000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10598
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9508.972184] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16137000
POWER_SUPPLY_POWER_NOW=10618000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10599
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9509.474537] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16137000
POWER_SUPPLY_POWER_NOW=10618000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10600
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9509.975193] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16137000
POWER_SUPPLY_POWER_NOW=10618000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10601
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9510.475018] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16137000
POWER_SUPPLY_POWER_NOW=10618000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10602
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9511.051028] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16124000
POWER_SUPPLY_POWER_NOW=10609000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10603
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9511.481650] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16124000
POWER_SUPPLY_POWER_NOW=10609000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10604
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9511.982358] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16124000
POWER_SUPPLY_POWER_NOW=10609000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10605
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

UDEV  [9512.489212] change   /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
ACTION=change
DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:41/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
SUBSYSTEM=power_supply
DEVTYPE=power_supply
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-poly
POWER_SUPPLY_CYCLE_COUNT=13
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15520000
POWER_SUPPLY_VOLTAGE_NOW=16124000
POWER_SUPPLY_POWER_NOW=10609000
POWER_SUPPLY_ENERGY_FULL_DESIGN=80000000
POWER_SUPPLY_ENERGY_FULL=84720000
POWER_SUPPLY_ENERGY_NOW=61850000
POWER_SUPPLY_CAPACITY=73
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=L24B4PC0
POWER_SUPPLY_MANUFACTURER=BYD
POWER_SUPPLY_SERIAL_NUMBER= 1054
SEQNUM=10606
USEC_INITIALIZED=8924055
PATH=/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/bin:/nix/store/5nmlhq0l0rxr9z201g1f4wf2pfy9gigq-udev-path/sbin

sudo tlp-stat -s -b

--- TLP 1.8.0 --------------------------------------------

+++ System Info
System         = LENOVO Legion 5 15AKP10 83F1
BIOS           = RYCN23WW
EC Firmware    = 1.23
OS Release     = NixOS 25.11 (Xantusia)
Kernel         = 6.16.5 #1-NixOS SMP PREEMPT_DYNAMIC Thu Sep  4 14:55:53 UTC 2025 x86_64
/proc/cmdline  = initrd=\EFI\nixos\lf4c4lkbywrnwpa2mqviyfn74n1q4g9s-initrd-linux-6.16.5-initrd.efi init=/nix/store/ws2hlb21r8lfcmnqmkfvhzf2d6p3lp0l-nixos-system-nixos-25.11pre856926.8eb28adfa3dc/init resume_offset=1540406 nvidia-drm.modeset=1 nvidia-drm.fbdev=1 loglevel=4 lsm=landlock,yama,bpf nvidia-drm.modeset=1 nvidia-drm.fbdev=1 nvidia.NVreg_OpenRmEnableUnsupportedGpus=1
Init system    = systemd 
Boot mode      = UEFI
Suspend mode   = [s2idle]

+++ TLP Status
State          = enabled
RDW state      = enabled
Last run       = 07:34:30 PM, 1 sec(s) ago
Mode           = battery
Power source   = battery

+++ Battery Care
Plugin: lenovo
Supported features: charge threshold
Driver usage:
* vendor (ideapad_laptop) = active (charge threshold)
Parameter value range:
* STOP_CHARGE_THRESH_BAT0: 0(off), 1(on) -- battery conservation mode

/sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode = 1 (on)

+++ Battery Status: BAT0
/sys/class/power_supply/BAT0/manufacturer                   = BYD
/sys/class/power_supply/BAT0/model_name                     = L24B4PC0
/sys/class/power_supply/BAT0/cycle_count                    =     13
/sys/class/power_supply/BAT0/energy_full_design             =  80000 [mWh]
/sys/class/power_supply/BAT0/energy_full                    =  84720 [mWh]
/sys/class/power_supply/BAT0/energy_now                     =  61000 [mWh]
/sys/class/power_supply/BAT0/power_now                      =  10638 [mW]
/sys/class/power_supply/BAT0/status                         = Discharging

Charge                                                      =   72.0 [%]
Capacity                                                    =  105.9 [%]

sudo tlp-stat --psup

--- TLP 1.8.0 --------------------------------------------

+++ Power supply diagnostic
/sys/class/power_supply/ADP0/type: Mains
/sys/class/power_supply/ADP0/online: 0
/sys/class/power_supply/BAT0/type: Battery
/sys/class/power_supply/BAT0/present: 1
/sys/class/power_supply/BAT0/capacity: 72
/sys/class/power_supply/BAT0/energy_full_design: 80000000
/sys/class/power_supply/BAT0/energy_full: 84720000
/sys/class/power_supply/BAT0/energy_now: 61000000
/sys/class/power_supply/BAT0/power_now: 10814000
/sys/class/power_supply/BAT0/voltage_now: 16117000
/sys/class/power_supply/BAT0/status: Discharging
/sys/class/power_supply/BAT0/device/path: \_SB_.PCI0.LPC0.EC0_.BAT0
/sys/class/power_supply/ucsi-source-psy-USBC000:001/type: USB
/sys/class/power_supply/ucsi-source-psy-USBC000:001/usb_type: [C] PD PD_PPS
/sys/class/power_supply/ucsi-source-psy-USBC000:001/online: 0
/sys/class/power_supply/ucsi-source-psy-USBC000:001/current_now: 0
/sys/class/power_supply/ucsi-source-psy-USBC000:001/voltage_max: 0
/sys/class/power_supply/ucsi-source-psy-USBC000:001/voltage_min: 0
/sys/class/power_supply/ucsi-source-psy-USBC000:001/voltage_now: 0
/sys/class/power_supply/ucsi-source-psy-USBC000:002/type: USB
/sys/class/power_supply/ucsi-source-psy-USBC000:002/usb_type: [C] PD PD_PPS
/sys/class/power_supply/ucsi-source-psy-USBC000:002/online: 0
/sys/class/power_supply/ucsi-source-psy-USBC000:002/current_now: 0
/sys/class/power_supply/ucsi-source-psy-USBC000:002/voltage_max: 0
/sys/class/power_supply/ucsi-source-psy-USBC000:002/voltage_min: 0
/sys/class/power_supply/ucsi-source-psy-USBC000:002/voltage_now: 0

+++ udev diagnostic
Reading rules file: /nix/store/pfvvkmwq9987j8xywkna9585yln9mdkl-udev-rules/85-tlp.rules
  RUN{program} : /nix/store/dq5fdsfzs2p4ixvy204a8m8j5fkgf6zv-tlp-1.8.0/sbin/tlp auto
OK.

[Iceburgino]

If that is of interest to you, the ACPI event spam seems to happen only after I wake up from sleep. On a clean system startup, the system doesn't generate any of those. Reconnecting and disconnecting the charger may temporarily disable the issue, but not for long - after some time (I think there's no pattern for how long), EC relapses into sending these events.

[linrunner]

Your events do not offer any attributes that would allow them to be distinguished and automatically filtered out.

Would it then be a viable alternative to let one customize the rule? So that if a system is peculiar, the user can make it work without you having to account for every specific of every machine?

The udev rule can only be adjusted directly, as you have already done successfully.

If TLP must first be started to evaluate configuration and respond accordingly, then you have exactly your current situation and the corresponding CPU requirements. Btw, TLP first checks whether the power source has actually changed. If not, the tunables are not written at all, but the process ends immediately after the check.

TLP is not intended as a self-help tool for bypassing messed-up BIOS firmware.

[Iceburgino]

The udev rule can only be adjusted directly, as you have already done successfully.

That was actually for another script I am using. I can't modify the udev rule directly because it is NixOS. That's where my proposal to customize it came from. Besides, regarding the CPU requirements, wouldn't TLP need to reconfigure the udev rule only once, when the user asks it to?

I agree that the problem has nothing to do with TLP. I have seen, though, that several other models had a similar issue.

https://bbs.archlinux.org/viewtopic.php?id=297323

systemd/systemd#21751

And I wonder how common the issue is, because I had to actively look for it to notice that my laptop sometimes draws more power than usual. So perhaps it would be a worthwhile mechanism still?