Legion R9000P's current fan curve are always zeros

[lixit]

Problem Description

Has the bug occurred following steps described in the README?
yes, during test Quick Test: Reading Current Fancurve from Hardware

What steps did you take?

What commands did you enter?
sudo cat /sys/kernel/debug/legion/fancurve

What was the (full) error you received and what command or action did lead to it?
EC Chip ID is not 8227
current fan curve are always zeros

Model and Debug Info

Distribution: Manjaro Linux 6.6.19-1-MANJARO (including version, e.g. Ubuntu 24.04)
Model name: R9000P
CPU model: AMD Ryzen 9 7945HX with Radeon Graphics (e.g. AMD Ryzen 7 5800H)
GPU model: RTX4060 (e.g NVIDIA RTX 3700)
Keyboard backlight: single color with off/medium/bright (RGB, single color with off/on, single color with off/medium/bright)
Light in lid or logo: yes (yes/no)
Light at IO-Ports at back: yes (yes/no)

Output of sudo dmidecode -t system. Please remove Serial Number and UUID for privacy:

# dmidecode 3.5
Getting SMBIOS data from sysfs.
SMBIOS 3.4.0 present.

Handle 0x0001, DMI type 1, 27 bytes
System Information
	Manufacturer: LENOVO
	Product Name: 82WM
	Version: Legion R9000P ARX8
	Serial Number: *****
	UUID: ******
	Wake-up Type: Power Switch
	SKU Number: LENOVO_MT_82WM_BU_idea_FM_Legion R9000P ARX8
	Family: Legion R9000P ARX8

Handle 0x0017, DMI type 12, 5 bytes
System Configuration Options
	Option 1: String1 for Type12 Equipment Manufacturer
	Option 2: String2 for Type12 Equipment Manufacturer
	Option 3: String3 for Type12 Equipment Manufacturer
	Option 4: String4 for Type12 Equipment Manufacturer

Handle 0x0026, DMI type 32, 20 bytes
System Boot Information
	Status: No errors detected

Output of sudo dmidecode -t bios:

# dmidecode 3.5
Getting SMBIOS data from sysfs.
SMBIOS 3.4.0 present.

Handle 0x0000, DMI type 0, 26 bytes
BIOS Information
	Vendor: LENOVO
	Version: LPCN42WW
	Release Date: 06/02/2023
	Address: 0xE0000
	Runtime Size: 128 kB
	ROM Size: 32 MB
	Characteristics:
		PCI is supported
		PNP is supported
		BIOS is upgradeable
		BIOS shadowing is allowed
		Boot from CD is supported
		Selectable boot is supported
		EDD is supported
		ACPI is supported
		USB legacy is supported
		BIOS boot specification is supported
		Function key-initiated network boot is supported
		Targeted content distribution is supported
		UEFI is supported
	BIOS Revision: 1.42
	Firmware Revision: 1.42

Handle 0x0018, DMI type 13, 22 bytes
BIOS Language Information
	Language Description Format: Long
	Installable Languages: 4
		en|US|iso8859-1
		fr|FR|iso8859-1
		ja|JP|unicode
		zh|TW|unicode
	Currently Installed Language: en|US|iso8859-1

Output of sudo cat /sys/kernel/debug/legion/fancurve:

sudo cat /sys/kernel/debug/legion/fancurve                                                                                                                         ✔ 
EC Chip ID: 5507
EC Chip Version: 2a4
legion_laptop features: fancurve powermode platformprofile platformprofilenotify minifancurve
legion_laptop ec_readonly: 0
ACPI CFG error: 0
ACPI CFG: 2081289482
temperature access method: 5
CPU temperature error: 0
CPU temperature: 49
CPU temperature EC error: 0
CPU temperature EC: 0
CPU temperature ACPI error: 0
CPU temperature ACPI: 49
CPU temperature WMI error: 0
CPU temperature WMI: 0
CPU temperature WMI2 error: 0
CPU temperature WMI2: 0
CPU temperature WMI3 error: 0
CPU temperature WMI3: 49
GPU temperature error: 0
GPU temperature: 39
GPU temperature EC error: 0
GPU temperature EC: 0
GPU temperature ACPI error: 0
GPU temperature ACPI: 39
GPU temperature WMI error: 0
GPU temperature WMI: 0
GPU temperature WMI2 error: 0
GPU temperature WMI2: 0
GPU temperature WMI3 error: 0
GPU temperature WMI3: 39
fan speed access method: 5
1 fanspeed error: 0
1 fanspeed: 1900
1 fanspeed EC error: 0
1 fanspeed EC: 48
1 fanspeed ACPI error: 0
1 fanspeed ACPI: 1900
1 fanspeed WMI error: 0
1 fanspeed WMI: 0
1 fanspeed WMI2 error: 0
1 fanspeed WMI2: 0
1 fanspeed WMI3 error: 0
1 fanspeed WMI3: 1900
2 fanspeed error: 0
2 fanspeed: 1800
2 fanspeed EC error: 0
2 fanspeed EC: 0
2 fanspeed ACPI error: 0
2 fanspeed ACPI: 1800
2 fanspeed WMI error: 0
2 fanspeed WMI: 0
2 fanspeed WMI2 error: 0
2 fanspeed WMI2: 0
2 fanspeed WMI3 error: 0
2 fanspeed WMI3: 1800
powermode access method: 3
powermode error: 0
powermode: 1
powermode EC error: 0
powermode EC: 18
powermode ACPI error: -5
powermode ACPI: 0
powermode WMI error: 0
powermode WMI: 1
has custom powermode: 1
ACPI rapidcharge error: 0
ACPI rapidcharge: 0
WMI backlight 2 state: 0
WMI backlight 3 state: 0
WMI light IO port: 0
WMI light Y logo/lid: 0
EC minifancurve feature enabled: 0
EC minifancurve on cool: error
EC lockfancontroller error: 0
EC lockfancontroller: false
fanfullspeed error: 0
fanfullspeed: 0
fanfullspeed EC error: 0
fanfullspeed EC: 0
EC fan curve current point id: 0
EC fan curve points size: 10
Current fan curve in hardware:
rpm1|rpm2|acceleration|deceleration|cpu_min_temp|cpu_max_temp|gpu_min_temp|gpu_max_temp|ic_min_temp|ic_max_temp
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
=====================
Current fan curve in hardware (WMI; might be empty)
rpm1|rpm2|acceleration|deceleration|cpu_min_temp|cpu_max_temp|gpu_min_temp|gpu_max_temp|ic_min_temp|ic_max_temp
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
0	 0	 0	 0	 0	 0	 0	 0	 0	 0
=====================