[NixOS] ERROR: failed to read battery BAT1 thresholds: CalledProcessError(1, ['cat', '/sys/class/power_supply/BAT1/charge_start_threshold'])

[raexera]

Summary

I'm encountering an error with battery threshold settings on my Lenovo Yoga Slim 7 Pro X (14IAH7). The system fails to read battery threshold values, resulting in the error below.

Laptop Model

Lenovo Yoga Slim 7 Pro X (14IAH7)

Error output:

cat: /sys/class/power_supply/BAT1/charge_start_threshold: No such file or directory
ERROR: failed to read battery BAT1 thresholds: CalledProcessError(1, ['cat', '/sys/class/power_supply/BAT1/charge_start_threshold'])

System information:

-------------------------------- Battery Info ---------------------------------

battery count = 1
cat: /sys/class/power_supply/BAT1/charge_start_threshold: No such file or directory
ERROR: failed to read battery BAT1 thresholds: CalledProcessError(1, ['cat', '/sys/class/power_supply/BAT1/charge_start_threshold'])

-------------------------------------------------------------------------------

Linux distro: NixOS 24.11 Vicuna
Linux kernel: 6.11.7
Processor: 12th Gen Intel(R) Core(TM) i7-12700H
Cores: 20
Architecture: x86_64
Driver: intel_pstate

------------------------------ Current CPU stats ------------------------------

CPU max frequency: 2300 MHz
CPU min frequency: 400 MHz

Core	Usage	Temperature	Frequency
CPU0      1.0%        45 °C      1131 MHz
CPU1      3.0%        45 °C       400 MHz
CPU2      1.0%        46 °C       400 MHz
CPU3      0.0%        46 °C       400 MHz
CPU4      8.0%        44 °C       463 MHz
CPU5      0.0%        44 °C       400 MHz
CPU6      2.0%        45 °C       429 MHz
CPU7      0.0%        45 °C       400 MHz
CPU8      1.0%        43 °C       400 MHz
CPU9      0.0%        43 °C       400 MHz
CPU10      3.0%        42 °C       701 MHz
CPU11      0.0%        42 °C       400 MHz
CPU12      2.0%        45 °C       598 MHz
CPU13      4.0%        45 °C       603 MHz
CPU14      3.0%        45 °C      1110 MHz
CPU15      3.0%        45 °C       400 MHz
CPU16      1.0%        44 °C       400 MHz
CPU17      9.1%        44 °C       400 MHz
CPU18      5.9%        45 °C       554 MHz
CPU19      2.0%        45 °C       628 MHz

auto-cpufreq version: 2.4.0

Python: 3.12.7
psutil package: 6.0.0
platform package: 1.0.8
click package: 8.1.7
distro package: 1.9.0

Computer type: /nix/store/mm0pa3z7kk6jh1i9rkxqxjqmd8h1qpxf-bash-5.2p37/bin/sh: line 1: dmidecode: command not found
Battery is: discharging

auto-cpufreq system resource consumption:
cpu usage: 0.0 %
memory use: 0.23 %

Total CPU usage: 0.8 %
Total system load: 0.63
Average temp. of all cores: 44.40 °C 

Currently using: powersave governor
Currently turbo boost is: off

-------------------------------------------------------------------------------

Config

{
  programs.auto-cpufreq = {
    enable = true;
    settings = {
      charger = {
        governor = "performance";
        energy_performance_preference = "performance";
        turbo = "auto";
      };
      battery = {
        governor = "powersave";
        energy_performance_preference = "power";
        turbo = "auto";
        enable_thresholds = true;
        ideapad_laptop_conservation_mode = true;
      };
    };
  };
}

Kernel Modules

Module                  Size  Used by
snd_seq_dummy          12288  0
snd_hrtimer            12288  1
snd_seq               110592  7 snd_seq_dummy
snd_seq_device         16384  1 snd_seq
rfcomm                102400  16
af_packet              65536  2
ccm                    20480  9
algif_aead             12288  0
crypto_null            16384  1 algif_aead
des3_ede_x86_64        45056  0
cbc                    12288  0
des_generic            12288  0
libdes                 20480  2 des_generic,des3_ede_x86_64
md4                    12288  0
xt_conntrack           12288  2
nf_conntrack          204800  1 xt_conntrack
cmac                   12288  3
nf_defrag_ipv6         24576  1 nf_conntrack
algif_hash             12288  1
nf_defrag_ipv4         12288  1 nf_conntrack
algif_skcipher         12288  1
af_alg                 32768  7 algif_hash,algif_skcipher,algif_aead
bnep                   28672  2
ip6t_rpfilter          12288  1
ipt_rpfilter           12288  1
xt_pkttype             12288  2
xt_LOG                 16384  2
nf_log_syslog          24576  2
xt_tcpudp              16384  3
nft_compat             24576  11
nf_tables             380928  153 nft_compat
sch_fq_codel           20480  1
msr                    12288  0
loop                   45056  0
tun                    69632  0
tap                    32768  0
macvlan                36864  0
bridge                401408  0
stp                    12288  1 bridge
llc                    16384  2 bridge,stp
acpi_call              12288  0
snd_ctl_led            24576  0
snd_soc_skl_hda_dsp    24576  4
snd_soc_hdac_hdmi      45056  1 snd_soc_skl_hda_dsp
snd_soc_intel_hda_dsp_common    16384  1 snd_soc_skl_hda_dsp
snd_sof_probes         24576  0
snd_hda_codec_hdmi     98304  1
snd_hda_codec_realtek   212992  1
snd_hda_codec_generic   110592  1 snd_hda_codec_realtek
snd_hda_scodec_component    20480  1 snd_hda_codec_realtek
snd_soc_dmic           12288  1
snd_sof_pci_intel_tgl    16384  0
snd_sof_pci_intel_cnl    20480  1 snd_sof_pci_intel_tgl
snd_sof_intel_hda_generic    40960  2 snd_sof_pci_intel_tgl,snd_sof_pci_intel_cnl
soundwire_intel        81920  1 snd_sof_intel_hda_generic
soundwire_cadence      45056  1 soundwire_intel
mousedev               24576  0
joydev                 24576  0
snd_sof_intel_hda_common   200704  3 snd_sof_intel_hda_generic,snd_sof_pci_intel_tgl,snd_sof_pci_intel_cnl
snd_soc_hdac_hda       28672  1 snd_sof_intel_hda_common
snd_sof_intel_hda_mlink    36864  3 soundwire_intel,snd_sof_intel_hda_common,snd_sof_intel_hda_generic
snd_sof_intel_hda      20480  2 snd_sof_intel_hda_common,snd_sof_intel_hda_generic
snd_sof_pci            24576  3 snd_sof_intel_hda_generic,snd_sof_pci_intel_tgl,snd_sof_pci_intel_cnl
snd_sof_xtensa_dsp     16384  1 snd_sof_intel_hda_generic
intel_uncore_frequency    12288  0
snd_sof               458752  6 snd_sof_pci,snd_sof_intel_hda_common,snd_sof_intel_hda_generic,snd_sof_probes,snd_sof_intel_hda,snd_sof_pci_intel_cnl
intel_uncore_frequency_common    16384  1 intel_uncore_frequency
x86_pkg_temp_thermal    16384  0
intel_powerclamp       20480  0
nls_iso8859_1          12288  1
snd_sof_utils          16384  1 snd_sof
snd_soc_acpi_intel_match   110592  3 snd_sof_intel_hda_generic,snd_sof_pci_intel_tgl,snd_sof_pci_intel_cnl
nls_cp437              16384  1
coretemp               16384  0
soundwire_generic_allocation    12288  1 soundwire_intel
vfat                   24576  1
snd_soc_acpi           16384  2 snd_soc_acpi_intel_match,snd_sof_intel_hda_generic
soundwire_bus         143360  3 soundwire_intel,soundwire_generic_allocation,soundwire_cadence
iwlmvm                659456  0
fat                   106496  1 vfat
kvm_intel             434176  0
snd_soc_avs           233472  0
snd_soc_hda_codec      28672  1 snd_soc_avs
snd_hda_ext_core       36864  7 snd_soc_avs,snd_soc_hda_codec,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_sof_intel_hda_mlink,snd_sof_intel_hda
kvm                  1372160  1 kvm_intel
snd_soc_core          450560  10 snd_soc_avs,snd_soc_hda_codec,soundwire_intel,snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_sof_probes,snd_soc_dmic,snd_soc_skl_hda_dsp
mac80211             1622016  1 iwlmvm
snd_compress           28672  3 snd_soc_avs,snd_soc_core,snd_sof_probes
ac97_bus               12288  1 snd_soc_core
snd_pcm_dmaengine      16384  1 snd_soc_core
snd_hda_intel          65536  0
nvidia_drm            139264  5
snd_intel_dspcfg       40960  5 snd_soc_avs,snd_hda_intel,snd_sof,snd_sof_intel_hda_common,snd_sof_intel_hda_generic
crct10dif_pclmul       12288  1
crc32_pclmul           12288  0
snd_intel_sdw_acpi     16384  2 snd_intel_dspcfg,snd_sof_intel_hda_generic
polyval_clmulni        12288  0
hid_multitouch         36864  0
snd_hda_codec         217088  10 snd_hda_codec_generic,snd_soc_avs,snd_hda_codec_hdmi,snd_soc_hda_codec,snd_hda_intel,snd_hda_codec_realtek,snd_soc_intel_hda_dsp_common,snd_soc_hdac_hda,snd_sof_intel_hda,snd_soc_skl_hda_dsp
polyval_generic        12288  1 polyval_clmulni
ptp                    45056  1 iwlmvm
ghash_clmulni_intel    16384  0
sha512_ssse3           53248  0
nvidia_modeset       1671168  3 nvidia_drm
processor_thermal_device_pci    16384  0
pps_core               32768  1 ptp
sha256_ssse3           32768  0
processor_thermal_device    20480  1 processor_thermal_device_pci
hid_generic            12288  0
xe                   3084288  0
libarc4                12288  1 mac80211
uvcvideo              180224  2
btusb                  77824  0
sha1_ssse3             32768  0
processor_thermal_wt_hint    12288  2 processor_thermal_device_pci,processor_thermal_device
cmdlinepart            16384  0
snd_hda_core          147456  13 snd_hda_codec_generic,snd_soc_avs,snd_hda_codec_hdmi,snd_soc_hda_codec,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_soc_intel_hda_dsp_common,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_sof_intel_hda
aesni_intel           122880  10
btrtl                  32768  1 btusb
videobuf2_vmalloc      20480  1 uvcvideo
processor_thermal_rfim    24576  1 processor_thermal_device
nvidia_uvm           3837952  0
iTCO_wdt               16384  0
gf128mul               16384  2 polyval_generic,aesni_intel
uvc                    12288  1 uvcvideo
spi_nor               163840  0
intel_rapl_msr         20480  0
btintel                69632  1 btusb
snd_hwdep              20480  1 snd_hda_codec
processor_thermal_rapl    16384  1 processor_thermal_device
crypto_simd            16384  1 aesni_intel
videobuf2_memops       16384  1 videobuf2_vmalloc
intel_pmc_bxt          16384  1 iTCO_wdt
iwlwifi               577536  1 iwlmvm
intel_rapl_common      53248  2 intel_rapl_msr,processor_thermal_rapl
cryptd                 28672  3 crypto_simd,ghash_clmulni_intel
drm_gpuvm              45056  1 xe
btbcm                  24576  1 btusb
mtd                   106496  3 spi_nor,cmdlinepart
snd_pcm               188416  13 snd_soc_avs,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,soundwire_intel,snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_compress,snd_soc_core,snd_sof_utils,snd_hda_core,snd_pcm_dmaengine
watchdog               49152  1 iTCO_wdt
intel_lpss_pci         28672  0
mei_hdcp               28672  0
ucsi_acpi              16384  0
drm_exec               12288  2 drm_gpuvm,xe
mei_pxp                20480  0
processor_thermal_wt_req    12288  1 processor_thermal_device
btmtk                  32768  1 btusb
intel_ish_ipc          36864  0
videobuf2_v4l2         40960  1 uvcvideo
intel_lpss             12288  1 intel_lpss_pci
rapl                   20480  0
bluetooth            1073152  44 btrtl,btmtk,btintel,btbcm,bnep,btusb,rfcomm
videodev              393216  2 videobuf2_v4l2,uvcvideo
typec_ucsi             73728  1 ucsi_acpi
gpu_sched              65536  1 xe
i2c_i801               40960  0
intel_cstate           20480  0
snd_timer              49152  3 snd_seq,snd_hrtimer,snd_pcm
igen6_edac             36864  0
intel_ishtp            86016  1 intel_ish_ipc
mei_me                 57344  2
spi_intel_pci          12288  0
i2c_mux                16384  1 i2c_i801
idma64                 20480  0
snd                   151552  25 snd_ctl_led,snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_sof,snd_timer,snd_soc_hdac_hdmi,snd_compress,snd_soc_core,snd_pcm
typec                 114688  1 typec_ucsi
videobuf2_common       94208  4 videobuf2_vmalloc,videobuf2_v4l2,uvcvideo,videobuf2_memops
drm_suballoc_helper    12288  1 xe
i2c_hid_acpi           12288  0
processor_thermal_power_floor    12288  2 processor_thermal_device_pci,processor_thermal_device
intel_uncore          262144  0
cfg80211             1384448  3 iwlmvm,iwlwifi,mac80211
mc                     90112  6 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
mei                   200704  5 mei_hdcp,mei_pxp,mei_me
crc16                  12288  1 bluetooth
spi_intel              36864  1 spi_intel_pci
nvidia_wmi_ec_backlight    12288  0
soundcore              16384  2 snd_ctl_led,snd
i2c_smbus              20480  1 i2c_i801
wmi_bmof               12288  0
8250_pci               73728  0
virt_dma               16384  1 idma64
edac_core             110592  1 igen6_edac
drm_ttm_helper         16384  2 nvidia_drm,xe
tiny_power_button      12288  0
thermal                28672  0
processor_thermal_mbox    12288  4 processor_thermal_power_floor,processor_thermal_wt_req,processor_thermal_rfim,processor_thermal_wt_hint
roles                  16384  1 typec_ucsi
i2c_hid                45056  1 i2c_hid_acpi
int3403_thermal        16384  0
hid                   266240  3 i2c_hid,hid_multitouch,hid_generic
fan                    28672  0
battery                28672  0
button                 28672  0
intel_pmc_core        122880  0
int340x_thermal_zone    16384  2 int3403_thermal,processor_thermal_device
int3400_thermal        24576  0
intel_vsec             20480  1 intel_pmc_core
acpi_thermal_rel       20480  1 int3400_thermal
intel_hid              28672  0
pmt_telemetry          16384  1 intel_pmc_core
pinctrl_tigerlake      28672  0
acpi_tad               20480  0
pmt_class              16384  1 pmt_telemetry
acpi_pad               24576  0
input_leds             12288  0
ac                     16384  0
evdev                  28672  35
nvidia              77529088  38 nvidia_uvm,nvidia_modeset
mac_hid                12288  0
serio_raw              16384  0
fuse                  204800  5
efi_pstore             12288  0
configfs               69632  1
nfnetlink              20480  3 nft_compat,nf_tables
zram                   40960  1
dmi_sysfs              24576  0
ip_tables              28672  0
x_tables               53248  8 xt_conntrack,ip6t_rpfilter,nft_compat,xt_LOG,xt_tcpudp,ipt_rpfilter,xt_pkttype,ip_tables
dm_mod                217088  0
dax                    53248  1 dm_mod
btrfs                2142208  1
blake2b_generic        24576  0
libcrc32c              12288  3 nf_conntrack,btrfs,nf_tables
crc32c_generic         12288  0
xor                    20480  1 btrfs
raid6_pq              122880  1 btrfs
xhci_pci               24576  0
i915                 4513792  27
xhci_pci_renesas       24576  1 xhci_pci
thunderbolt           569344  0
nvme                   65536  2
crc32c_intel           16384  2
xhci_hcd              389120  1 xhci_pci
rtc_cmos               28672  1
nvme_core             241664  3 nvme
nvme_auth              24576  1 nvme_core
tpm_crb                28672  0
tpm_tis                16384  0
tpm_tis_core           32768  1 tpm_tis
atkbd                  40960  0
libps2                 24576  1 atkbd
vivaldi_fmap           12288  1 atkbd
ideapad_laptop         69632  0
sparse_keymap          12288  2 intel_hid,ideapad_laptop
i8042                  57344  1 ideapad_laptop
platform_profile       12288  1 ideapad_laptop
rfkill                 40960  10 iwlmvm,bluetooth,ideapad_laptop,cfg80211
led_class              20480  5 snd_hda_codec_generic,videodev,input_leds,iwlmvm,ideapad_laptop
serio                  28672  4 serio_raw,atkbd,i8042
i2c_algo_bit           20480  2 xe,i915
drm_buddy              24576  2 xe,i915
video                  81920  5 nvidia_wmi_ec_backlight,ideapad_laptop,xe,i915,nvidia_modeset
wmi                    32768  4 video,nvidia_wmi_ec_backlight,wmi_bmof,ideapad_laptop
backlight              28672  6 video,nvidia_wmi_ec_backlight,ideapad_laptop,xe,i915,nvidia_modeset
ttm                   102400  3 drm_ttm_helper,xe,i915
intel_gtt              24576  1 i915
drm_display_helper    262144  2 xe,i915
cec                    73728  3 drm_display_helper,xe,i915
efivarfs               28672  1
tpm                   139264  3 tpm_tis,tpm_crb,tpm_tis_core
rng_core               20480  1 tpm
libaescfb              12288  1 tpm
ecdh_generic           16384  3 bluetooth,tpm
ecc                    40960  1 ecdh_generic
autofs4                61440  0

Issue Description:

This issue appears to stem from a missing /sys/class/power_supply/BAT1/charge_start_threshold file, which causes an error when attempting to read or set the battery threshold. Consequently, battery conservation mode cannot be activated. Adding ideapad_laptop_conservation_mode = true to the configuration did not resolve the issue, and loading the ideapad_laptop kernel module also did not have any effect.

Expected Behavior:

The battery threshold file should be accessible and adjustable, allowing battery conservation mode to activate as expected.

[AdnanHodzic]

Relates to #741, #765, #794

Since project is looking for contributors if you or anyone else wants to give it a try in implementing this functionality, please give it a try and contribute to the project and you will be credited for your work as part of future release.