Lenovo Battery Conservation mode fail

I've been trying to get battery conservation mode to work by doing the below, but ultimately I have been unable to get the setting to change from 0 to 1

Running kernel 5.11.0-37

Tried previous posted solutions of

echo 1 > /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode

however, when I look at the file ...

cat /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode
0

Trying this using sudo su also had no effect.

Also tried editing the file manually as root, but when reopening the file it is once again set to 0

Tried: TLP, which seems to confirm I can set an upper threshold for my Lenovo 7i, but it also references conservation_mode being set as 0 (100%)

sudo tlp setcharge 80 1

Setting temporary charge threshold for all batteries: conservation mode = 1


sudo tlp-stat -s -b --cdiff
--- TLP 1.4.0 --------------------------------------------

+++ Configured Settings (only differences to defaults):
/etc/tlp.conf L0514: RESTORE_THRESHOLDS_ON_BAT="1"
/etc/tlp.conf L0508: START_CHARGE_THRESH_BAT1="70"
/etc/tlp.conf L0509: STOP_CHARGE_THRESH_BAT1="80"

+++ System Info
System         = LENOVO Lenovo Legion 7 15IMHg05 81YU
BIOS           = E9CN62WW(V4.07)
OS Release     = Linux Mint 20.1
Kernel         = 5.11.0-37-generic #41~20.04.2-Ubuntu SMP Fri Sep 24 09:06:38 UTC 2021 x86_64
/proc/cmdline  = BOOT_IMAGE=/boot/vmlinuz-5.11.0-37-generic root=UUID=0e11e314-e8c7-4281-b1d0-a2e48e32244b ro nomodeset quiet splash nomodeset acpi_osi=! "acpi_osi=Windows 2020"
Init system    = systemd v245 (245.4-4ubuntu3.13)
Boot mode      = UEFI

+++ TLP Status
State          = enabled
RDW state      = enabled
Last run       = 18:07:12,  20084 sec(s) ago
Mode           = AC
Power source   = AC

+++ 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 = 0 (100%)

+++ Battery Status: BAT1
/sys/class/power_supply/BAT1/manufacturer                   = 0x53 0x4D 0x50 0x00 0x32 0x30 0x
/sys/class/power_supply/BAT1/model_name                     = 0x4C 0x31 0x39 0x4D 0x34 0x50 0x8000
/sys/class/power_supply/BAT1/cycle_count                    =     22
/sys/class/power_supply/BAT1/energy_full_design             =  80000 [mWh]
/sys/class/power_supply/BAT1/energy_full                    =  77870 [mWh]
/sys/class/power_supply/BAT1/energy_now                     =  77370 [mWh]
/sys/class/power_supply/BAT1/power_now                      =      0 [mW]
/sys/class/power_supply/BAT1/status                         = Idle

Charge                                                      =   99.4 [%]
Capacity                                                    =   97.3 [%]

If anyone has any possible solutions, explanations on why I cant seem to edit the conservation_mode file, it'd be much appreciated.

Edit the file: /etc/default/tlp.conf

• Uncomment the lines that has START/STOP_CHARGE_THRESH_BAT0/1
• For non-ThinkPad Lenovo set the START to dummy value of 0 and the STOP to 1
• For any ThinkPad Lenovo set the START/STOP to any numbers of percentages you want
• For more info & examples visit:
  • https://linrunner.de/tlp/settings/battery.html
  • https://linrunner.de/tlp/settings/bc-vendors.html
• The 3 following steps are optional:
  1. Uncomment the line that has TLP_ENABLE and set it to 1
  2. Uncomment the line that has TLP_WARN_LEVEL and set it to 3
  3. Uncomment the line that has NATACPI_ENABLE driver and set it to 1 (if ThinkPad enable the other 2 drivers as well)

To apply new charging configurations for current session only:

sudo tlp setcharge

To apply new configurations permanently and start tlp in (auto mode):

sudo tlp start

(OPTIONAL) This command will be suggested by tlp start if needed:

sudo systemctl enable tlp.service

sorry for being late.

I was having the same problem as you but I figured it out here: https://linrunner.de/tlp/settings/bc-vendors.html.

I was using this thread as a guide, I am using arch linux on a ideapad and I managed to fix the problem. The TLP documentation site I linked is very extensive, most problems occur with lenovo and, mainly, thinkpad laptops. But don't worry, you are using an ideapad which uses a different battery firmware.

The "battery conservation mode" functions like a set-in-stone battery threshold. For me, it turned on automatically once I set the STOP threshold to 1. But you may also try

echo 1 | sudo tee /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode

... Such as another user posted. If it does not work, you may need to install the ideapad ACPI package and try again.

TL;DR: Change your STOP to 1 and your start to 0, let the battery discharge to 59% and run sudo tlp-stat -b to check if the battery conservation mode is active.

NOTE: Excuse my english, it's not my first language. Hope it helps.

Unfortunately, the configuration of TLP is not quite intuitive in this case.

The crucial information is in the output of tlp-stat -b.

* STOP_CHARGE_THRESH_BAT0: 0(off), 1(on) -- battery conservation mode

BAT0 because conservation mode applies to all batteries regardless of their name.

For conservation mode you must configure:

STOP_CHARGE_THRESH_BAT0=1

Then use the terminal command

sudo tlp setcharge

Check

sudo tlp-stat -b

Your existing lines may be commented afterwards

/etc/tlp.conf L0508: START_CHARGE_THRESH_BAT1="70"
/etc/tlp.conf L0509: STOP_CHARGE_THRESH_BAT1="80"

A direct and simple solution to your problem would be this:

1. Check if Ideapad_laptop kernel module is loaded (You don't need to repeat this)

lsmod | grep ideapad_laptop

2. To know the current status of conservation mode:

(If Output is 1 - conservation mode ON, 0 - conservation mode OFF)

cat /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode

(You may have different name for "VPC2004:00" so check that by going to the folder "ideapad-acpi" by cd command and running ls there)

3. Use following command to turn on/off the conservation mode : (1 - conservation ON, 0 -conservation OFF)

echo 1 | sudo tee /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode

echo 0 | sudo tee /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode