Does anyone know how I can change the power profile on TLP from “balanced” to “low-power” so that it will survive reboot?

lnxtx
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61Y

There is an information in the /etc/tlp.conf file:

# Select platform profile:
#   performance, balanced, low-power.
# Controls system operating characteristics around power/performance levels,
# thermal and fan speed. Values are given in order of increasing power saving.
# Note: check the output of tlp-stat -p to determine availability on your
# hardware and additional profiles such as: balanced-performance, quiet, cool.
# Default: 
# !!!!!!!! Warning !!!!!!!!!
# When use power-profiles-daemon, please use below items in
# /var/lib/power-profiles-daemon/state.ini
#    1) "balanced" is default mode
#    2) "power-saver" mode means "low-power" in ppd
#    3) "performance" mode
# !!!!!!!!!!!!!!!!!!!!!!!!!!

#PLATFORM_PROFILE_ON_AC=performance
#PLATFORM_PROFILE_ON_BAT=low-power

So, it depends if your distro uses power-profiles-daemon or if your desktop environment controls power profiles.

hedge
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11Y

I’m on Linux Mint Cinnamon 21.2; power-profiles-daemon does not seem to be installed on my system 🤔. Typing cat /sys/firmware/acpi/platform_profile in the terminal comes up as “low-power”, which is what I switched it to from “balanced” by hitting Fn+l. How do I get this setting to survive reboot? Do I uncomment “#PLATFORM_PROFILE_ON_BAT=low-power” or is there another way?

lnxtx
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21Y

Do you want low-power setting only on a battery?

Create, for example, /etc/tlp.d/99-custom.conf file, with content:

PLATFORM_PROFILE_ON_BAT=low-power

Reload the settings: tlp start

And make sure the tlp service is enabled.

hedge
creator
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21Y

Do you want low-power setting only on a battery?

Yes, that’s what I’m aiming for. I’ve got a thinkpad x1 carbon 10th gen which is known for its not-so-great battery life, and so I’m trying to use the low-power setting for battery-only to see if that helps. If that doesn’t work I might try auto-cpufreq (do you know anything about that?) In any event, thanks very much for your response, I’ll create the .conf file and see if it works. 🙂👍

lnxtx
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21Y

TLP can also control CPU clock.

I’m using these settings on my trusty X260:

CPU_SCALING_GOVERNOR_ON_AC=performance
CPU_SCALING_GOVERNOR_ON_BAT=powersave

CPU_MIN_PERF_ON_AC=0
CPU_MAX_PERF_ON_AC=100

CPU_MIN_PERF_ON_BAT=0
CPU_MAX_PERF_ON_BAT=30

CPU_BOOST_ON_AC=1
CPU_BOOST_ON_BAT=0

CPU_HWP_DYN_BOOST_ON_AC=1
CPU_HWP_DYN_BOOST_ON_BAT=0

SCHED_POWERSAVE_ON_AC=0
SCHED_POWERSAVE_ON_BAT=1

USB_EXCLUDE_WWAN=1

hedge
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21Y

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