TLP, power management, battery saving in laptop

arubin · 07-06-2022, 02:47 AM

I have installed tlp in an attempt to improve battery life in my laptop. There are a few things that are puzzling me.

According to the README

Quote:

# Configure tlp to be run at startup
add "/etc/rc.d/rc.tlp start" (without quotes) to /etc/rc.d/rc.local

I had thought that everything in rc.d was run at startup. Is that not the case? Does this really have to be in rc.local?

I am not sure if I should be doing anything with the configuration. My laptop has an AMD Ryzen processors with AMD Radeon graphics.

Mark Pettit · 07-06-2022, 03:11 AM

No - merely putting a file in rc.d does NOT make it run. If it did, the first issue here would be : what order ? You still have to call your script directly from some other script that IS known to run.

business_kid · 07-06-2022, 04:58 AM

Of course, /etc/rc.d/rc.tlp also has to be executable.

arubin · 07-06-2022, 05:48 AM

Quote:

Originally Posted by business_kid

Of course, /etc/rc.d/rc.tlp also has to be executable.

I'm not that stupid.

marav · 07-06-2022, 06:18 AM

If you want to know what is launched at startup, look in /etc/rc.d/rc.M

rkelsen · 07-06-2022, 06:44 AM

Quote:

Originally Posted by Mark Pettit

No - merely putting a file in rc.d does NOT make it run. If it did, the first issue here would be : what order ? You still have to call your script directly from some other script that IS known to run.

It's worth pointing out that you can use the runlevel directories (/etc/rc.d/rc.*) if you want a script to run without having to call it from elsewhere.

chrisretusn · 07-06-2022, 06:50 AM

Quote:

Originally Posted by arubin

I had thought that everything in rc.d was run at startup. Is that not the case? Does this really have to be in rc.local?

Most of the default rc scritps do as long as you turn them on "x" including rc.local which runs from rc.M. Unless tlp need to run before specific events the rc.local should be good enough.