No CPU frequency scaling with newer kernels Lenovo Z510

[CMarch]

During some update my Lenovo Z510 with an Intel I7-4700MQ cpu lost the ability to automatically scale the cpu frequency with the following kernels (maybe a few previous ones too. I’m not sure).
linux 6.1.1.arch1-1
linux-lts 5.15.84-1
linux-lts510 5.10.153-1
The cpu frequency is at 798 MHz on battery and 798MHz or sometimes 2.4 GHz plugged in to the charger (it’s a crap shoot). All other functions seem to work as expected.

However,
linux-lts54 5.4.223-1
still scales dynamically as expected with battery or with charger plugged in. Although it seems to scale more aggressively with the charger than with battery only.

I only noticed because mkinitcpio was taking forever to finish compiling and browser page updates were slow.

This is similar to the problem reported in:

Why isn't my CPU scaling to maximum boost on battery any more?

It used to, then all of a sudden yesterday I noticed it doesn’t go above 3100 on battery. If it’s on charger, then it goes to 3500 as it should. It used to go to 3500 on battery as well, then something changed (I don’t know what) and now it’s like purposefully limiting speed on battery. Where should I look? System is: [Screenshot_20211015_103018] tlp & tlpui are installed.

I didn’t revive that topic since it was more than a year old.

Thanks to @jonathon and https://repo.m2x.dev/current/kernel-lts/x86_64/
I’m back to using linux-lts54 and I’m getting quicker browser responses and build times.

[CMarch]

Solution was pretty simple once I read through half a dozen wiki articles on cpu frequency at least twice.

• Installed cpupower
• Turned on governor=‘ondemand’ in /etc/default/cpupower
• Enabled cpupower.service with systemctl enable cpupower.service
• Started cpupower.service with systemctl start cpupower.service

Edit 1
Well the solution is not so simple. While

# cpupower frequency-set -g ondemand

works as expected, I cannot get the systemd service to honor the config file:
/etc/default/cpupower
that cpupower is supposed to read.

Edit2
Seems I had cpupower.service and cpupower-gui.service competing with each other. I Stopped and disabled cpupower-gui.service and all works as it should. Since I don’t plan on using cpupower-gui I installed it.