Problem Description
Dynamic Boost is disabled on Linux (so CPU takes 10-20W and GPU only 14, CPU wastes Ws as it just runs perfectly at 800Mhz-1Ghz which should use less Ws, theorically, Dynamic Boost should allocate more Ws to the GPU if it needs it) .
Model and Debug Info
Installation type: Github + DKMS
Distribution: CachyOS x86_64
Model name: 83LK (LOQ 15IAX9E) (LENOVO)
CPU model: Intel(R) Core(TM) i5-12450HX
GPU model: RTX 4050 Mobile
Keyboard backlight: single color with: off, medium, bright
Light in lid or logo: no
Light at IO-Ports at back: no
Output of sudo dmidecode -t system. Please remove Serial Number and UUID for privacy:
❯ sudo dmidecode -t system
# dmidecode 3.7
Getting SMBIOS data from sysfs.
SMBIOS 3.4 present.
Handle 0x0001, DMI type 1, 27 bytes
System Information
Manufacturer: LENOVO
Product Name: 83LK
Version: LOQ 15IAX9E
Serial Number: [REDACTED]
UUID: [REDACTED]
Wake-up Type: Power Switch
SKU Number: LENOVO_MT_83LK_BU_idea_FM_LOQ 15IAX9E
Family: LOQ 15IAX9E
Handle 0x0024, DMI type 12, 5 bytes
System Configuration Options
Option 1: ConfigOptions1
Option 2: ConfigOptions2
Option 3: ConfigOptions3
Handle 0x0027, DMI type 15, 29 bytes
System Event Log
Area Length: 0 bytes
Header Start Offset: 0x0000
Header Length: 8192 bytes
Data Start Offset: 0x2000
Access Method: General-purpose non-volatile data functions
Access Address: 0x0000
Status: Valid, Not Full
Change Token: 0x12345678
Header Format: OEM-specific
Supported Log Type Descriptors: 3
Descriptor 1: POST memory resize
Data Format 1: None
Descriptor 2: POST error
Data Format 2: POST results bitmap
Descriptor 3: Log area reset/cleared
Data Format 3: None
Handle 0x0032, DMI type 32, 11 bytes
System Boot Information
Status: No errors detected
~
❯
Output of sudo dmidecode -t bios:
# dmidecode 3.7
Getting SMBIOS data from sysfs.
SMBIOS 3.4 present.
Handle 0x0000, DMI type 0, 26 bytes
Platform Firmware Information
Vendor: LENOVO
Version: Q8CN21WW
Release Date: 08/21/2025
Address: 0xE0000
Runtime Size: 128 KiB
ROM Size: 16 MiB
Characteristics:
PCI is supported
Firmware is upgradeable
Firmware shadowing is allowed
Boot from CD is supported
Selectable boot is supported
EDD is supported
Japanese floppy for NEC 9800 1.2 MB is supported (int 13h)
Japanese floppy for Toshiba 1.2 MB is supported (int 13h)
5.25"/360 kB floppy services are supported (int 13h)
5.25"/1.2 MB floppy services are supported (int 13h)
3.5"/720 kB floppy services are supported (int 13h)
3.5"/2.88 MB floppy services are supported (int 13h)
8042 keyboard services are supported (int 9h)
CGA/mono video services are supported (int 10h)
ACPI is supported
USB legacy is supported
BIOS boot specification is supported
Targeted content distribution is supported
UEFI is supported
Platform Firmware Revision: 1.21
Embedded Controller Firmware Revision: 1.15
Handle 0x0025, DMI type 13, 22 bytes
Firmware Language Information
Language Description Format: Long
Installable Languages: 8
en|US|iso8859-1,0
fr|FR|iso8859-1,0
zh|TW|unicode,0
ja|JP|unicode,0
it|IT|iso8859-1,0
es|ES|iso8859-1,0
de|DE|iso8859-1,0
pt|PT|iso8859-1,0
Currently Installed Language: en|US|iso8859-1,0
~
❯
Output of sudo cat /sys/kernel/debug/legion/fancurve:
EC Chip ID: 8227
EC Chip Version: 726
legion_laptop features: fancurve powermode platformprofile platformprofilenotify minifancurve fancurve_pmw_speed fancurve_rpm_speed
legion_laptop ec_readonly: 0
ACPI CFG error: 0
ACPI CFG: 2081289494
temperature access method: 5
CPU temperature error: 0
CPU temperature: 69
CPU temperature EC error: 0
CPU temperature EC: 55
CPU temperature ACPI error: -5
CPU temperature ACPI: 55
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: 69
GPU temperature error: 0
GPU temperature: 0
GPU temperature EC error: 0
GPU temperature EC: 87
GPU temperature ACPI error: -5
GPU temperature ACPI: 87
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: 0
fan speed access method: 5
1 fanspeed error: 0
1 fanspeed: 2900
1 fanspeed EC error: 0
1 fanspeed EC: 41183
1 fanspeed ACPI error: -5
1 fanspeed ACPI: 41183
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: 2900
2 fanspeed error: 0
2 fanspeed: 0
2 fanspeed EC error: 0
2 fanspeed EC: 40960
2 fanspeed ACPI error: -22
2 fanspeed ACPI: 40960
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: 0
powermode access method: 3
powermode error: 0
powermode: 1
powermode EC error: 0
powermode EC: 0
powermode ACPI error: -5
powermode ACPI: 0
powermode WMI error: 0
powermode WMI: 1
has custom powermode: 1
ACPI rapidcharge error: -5
ACPI rapidcharge: 0
WMI backlight 2 state: 0
WMI backlight 3 state: 1
WMI light IO port: 0
WMI light Y logo/lid: 1
EC minifancurve feature enabled: 1
EC minifancurve on cool: false
EC lockfancontroller error: -1
EC lockfancontroller: error
fanfullspeed error: 0
fanfullspeed: 0
fanfullspeed EC error: -1
fanfullspeed EC: 0
Max speed for fancurve: 10000
Current fan curve in hardware:
Fan curve current point id: 0
Fan curve points size: 10
u(speed_of_unit)|speed1[u]|speed2[u]|speed1[pwm]|speed2[pwm]|acceleration|deceleration|cpu_min_temp|cpu_max_temp|gpu_min_temp|gpu_max_temp|ic_min_temp|ic_max_temp
1 1 0 2 0 0 0 0 0 0 0 0 0
1 2 0 5 0 0 0 0 0 0 0 0 0
1 3 0 7 0 0 0 0 0 0 0 0 0
1 4 0 10 0 0 0 0 0 0 0 0 0
1 5 0 12 0 0 0 0 0 0 0 0 0
1 6 0 15 0 0 0 0 0 0 0 0 0
1 7 0 17 0 0 0 0 0 0 0 0 0
1 8 0 20 0 0 0 0 0 0 0 0 0
1 8 0 20 0 0 0 0 0 0 0 0 0
1 8 0 20 0 0 0 0 0 0 0 0 0
=====================
Current fan curve in hardware (WMI; might be empty)
Fan curve current point id: 0
Fan curve points size: 10
u(speed_of_unit)|speed1[u]|speed2[u]|speed1[pwm]|speed2[pwm]|acceleration|deceleration|cpu_min_temp|cpu_max_temp|gpu_min_temp|gpu_max_temp|ic_min_temp|ic_max_temp
1 1 0 2 0 0 0 0 0 0 0 0 0
1 2 0 5 0 0 0 0 0 0 0 0 0
1 3 0 7 0 0 0 0 0 0 0 0 0
1 4 0 10 0 0 0 0 0 0 0 0 0
1 5 0 12 0 0 0 0 0 0 0 0 0
1 6 0 15 0 0 0 0 0 0 0 0 0
1 7 0 17 0 0 0 0 0 0 0 0 0
1 8 0 20 0 0 0 0 0 0 0 0 0
1 8 0 20 0 0 0 0 0 0 0 0 0
1 8 0 20 0 0 0 0 0 0 0 0 0
=====================
Edit: followed this, then restarted dbus and nvidia-powerd and got PC to freeze (Alt+fn+f3 not working, and everything else).
NVIDIA-POWERD output
● nvidia-powerd.service - nvidia-powerd service
Loaded: loaded (/usr/lib/systemd/system/nvidia-powerd.service; enabled; preset: disabled)
Active: active (running) since Sat 2026-08-22 13:12:34 CEST; 11min ago
Invocation: 144e8cc533f94721b6112bb25b85a16d
Main PID: 1072 (nvidia-powerd)
Tasks: 5 (limit: 18559)
Memory: 6.9M (peak: 7.7M)
CPU: 3.264s
CGroup: /system.slice/nvidia-powerd.service
└─1072 /usr/bin/nvidia-powerd
ago 22 13:12:34 cachyos-x8664-LOQ systemd[1]: Started nvidia-powerd service.
ago 22 13:12:34 cachyos-x8664-LOQ nvidia-powerd[1072]: nvidia-powerd version:2.0 (build 1)
ago 22 13:12:34 cachyos-x8664-LOQ nvidia-powerd[1072]: DBus Connection is established
ago 22 13:12:35 cachyos-x8664-LOQ nvidia-powerd[1072]: ERROR! Client (presumably SBIOS) has requested to disable Dynamic Boost DC controller
~
❯
Problem Description
Dynamic Boost is disabled on Linux (so CPU takes 10-20W and GPU only 14, CPU wastes Ws as it just runs perfectly at 800Mhz-1Ghz which should use less Ws, theorically, Dynamic Boost should allocate more Ws to the GPU if it needs it) .
Model and Debug Info
Installation type: Github + DKMS
Distribution: CachyOS x86_64
Model name: 83LK (LOQ 15IAX9E) (LENOVO)
CPU model: Intel(R) Core(TM) i5-12450HX
GPU model: RTX 4050 Mobile
Keyboard backlight: single color with: off, medium, bright
Light in lid or logo: no
Light at IO-Ports at back: no
Output of
sudo dmidecode -t system. Please remove Serial Number and UUID for privacy:Output of
sudo dmidecode -t bios:Output of
sudo cat /sys/kernel/debug/legion/fancurve:Edit: followed this, then restarted dbus and nvidia-powerd and got PC to freeze (Alt+fn+f3 not working, and everything else).
NVIDIA-POWERD output