Add Lenovo L490 to the supported devices

[xtermi2]

I'm using this fix successfully since ~6 month on my Lenovo L490 with these stable settings:

[GENERAL]
# Enable or disable the script execution
Enabled: True
# SYSFS path for checking if the system is running on AC power
Sysfs_Power_Path: /sys/class/power_supply/AC*/online

## Settings to apply while connected to Battery power
[BATTERY]
# Update the registers every this many seconds
Update_Rate_s: 30
# Max package power for time window #1
PL1_Tdp_W: 29
# Time window #1 duration
PL1_Duration_s: 28
# Max package power for time window #2
PL2_Tdp_W: 44
# Time window #2 duration
PL2_Duration_S: 0.002
# Max allowed temperature before throttling
Trip_Temp_C: 85
# Set cTDP to normal=0, down=1 or up=2 (EXPERIMENTAL)
cTDP: 0
# Disable BDPROCHOT (EXPERIMENTAL)
Disable_BDPROCHOT: False

## Settings to apply while connected to AC power
[AC]
# Update the registers every this many seconds
Update_Rate_s: 5
# Max package power for time window #1
PL1_Tdp_W: 44
# Time window #1 duration
PL1_Duration_s: 28
# Max package power for time window #2
PL2_Tdp_W: 44
# Time window #2 duration
PL2_Duration_S: 0.002
# Max allowed temperature before throttling
Trip_Temp_C: 95
# Set HWP energy performance hints to 'performance' on high load (EXPERIMENTAL)
HWP_Mode: True
# Set cTDP to normal=0, down=1 or up=2 (EXPERIMENTAL)
cTDP: 2
# Disable BDPROCHOT (EXPERIMENTAL)
Disable_BDPROCHOT: False

# All voltage values are expressed in mV and *MUST* be negative (i.e. undervolt)!
[UNDERVOLT.BATTERY]
# CPU core voltage offset (mV)
CORE: -100
# Integrated GPU voltage offset (mV)
GPU: -70
# CPU cache voltage offset (mV)
CACHE: -100
# System Agent voltage offset (mV)
UNCORE: -70
# Analog I/O voltage offset (mV)
ANALOGIO: 0

# All voltage values are expressed in mV and *MUST* be negative (i.e. undervolt)!
[UNDERVOLT.AC]
# CPU core voltage offset (mV)
CORE: -110
# Integrated GPU voltage offset (mV)
GPU: -80
# CPU cache voltage offset (mV)
CACHE: -110
# System Agent voltage offset (mV)
UNCORE: -80
# Analog I/O voltage offset (mV)
ANALOGIO: 0

# [ICCMAX.AC]
# # CPU core max current (A)
# CORE: 
# # Integrated GPU max current (A)
# GPU: 
# # CPU cache max current (A)
# CACHE: 

# [ICCMAX.BATTERY]
# # CPU core max current (A)
# CORE: 
# # Integrated GPU max current (A)
# GPU: 
# # CPU cache max current (A)
# CACHE: 

Before I applied this fix, under heavy load my CPU frequency was throttled down to under 1 GHz and the fan was never activated. Now I get 3.3GHz under full cpu load - 3 times faster than the default settings (under benchmarking conditions). Under realistic conditions in my daily work, like compiling java projects, my Laptop is more then 2 times faster than before - much more fun to work like before - so thanks a lot for this fix.

This should be proof enough to add the Lenovo L490 to the supported devices.

[Yavieh]

Hey, i use Fedora 34 on the L490 but cant get it so work. The Cpu only hits 70° and then it starts to throttle to 1 GHz as you mentioned. What can i do to get it running? Maybe im doing something wrong here?

[xtermi2]

I can't say anything about Fedora. I use Ubuntu and there it's just working like described in the readme/documentation.

[Yavieh]

So you just installed it and updated the conf via text editor?

[xtermi2]

Yes, maybe you have to restart the the service sudo systemctl restart lenovo_fix.service, don't know if the config Autoreload is enabled by default.
Have you tried the monitoring https://github.com/erpalma/throttled#monitoring ? This should reflect your settings/configuration.
I used the s-tui tool to create load https://github.com/erpalma/throttled#is-this-tool-really-doing-something-on-my-pc

[Yavieh]

Getting this
[I] Detected CPU architecture: Intel Comet Lake-U
[I] Trying to unlock MSR allow_writes.
[I] Loading config file.
[E] Unable to write to MSR MSR_OC_MAILBOX (150). Try to disable Secure Boot and check if your kernel does not restrict access to MSR.

trying to disable secure boot now

[Yavieh]

Okay that was the Problem. Now its working and i get more that 3 ghz :) Thanks for helping