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Linux - Laptop and Netbook Having a problem installing or configuring Linux on your laptop? Need help running Linux on your netbook? This forum is for you. This forum is for any topics relating to Linux and either traditional laptops or netbooks (such as the Asus EEE PC, Everex CloudBook or MSI Wind).


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Old 02-09-2006, 09:56 PM   #1
Registered: Jan 2004
Location: Earth
Distribution: Ubuntu
Posts: 287

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Need Help w/ Laptop power management

ok, i have found quite a bit on the topic of power management for laptops. however, i am still a noob and need instructions broken down barney-style. I found this:

however, i know it's late but i can't seem to find directions for the step by step. this is very frustrating. as much as i like ubuntu i am not going to keep it if i can't setup my battery situation better than this. as always, help is appreciated.

p.s. typing 'laptop-mode start' doesn't do anything. and i did install the latest version of laptop-tools. it says that it is installed but not activated.
Old 02-10-2006, 02:04 AM   #2
Registered: May 2005
Location: Bellingham, WA
Distribution: Suse 10.2
Posts: 77

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Do you have the newest kernel? Are you working with ACPI at all? What type of battery-related thigns have you tried?
Old 02-11-2006, 09:21 AM   #3
Registered: Jan 2004
Location: Earth
Distribution: Ubuntu
Posts: 287

Original Poster
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kernel: 2.6.12-10-386
this was stock on the ubuntu 5.10 i recently installed. i started looking at power issues when i unplugged the laptop and noticed i had 30 mins whereas i usually have around an hour (old it can do is an hour or so). so after installing the 'laptop-mode' i see that the time has gone up after running through those suggestions in my previous links but i am just curious now as to why it says that it is installed but not activated. if this is normal than i won't bother any further.
Old 02-11-2006, 10:18 AM   #4
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Registered: Feb 2006
Location: Okinawa, Japan
Distribution: Debian
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I haven't worked with Ubuntu, but I have run into a few distros that ACPI didn't start with out a little encouragement. You said that typing 'laptop-mode start' did nothing. Was the command not found?

I have seen two parts to get power management working:
1. ACPI kernel options need to be included or modules.
2. The ACPI service needs installed and ran.

The way I ensure the first is to compile the kernel myself. I always like to start with the .config file from the distribution; move it to the source directory, and type 'make oldconfig'. You will be prompted for new features. Then 'make menuconfig'. I include ACPI options as modules and disable APM. If you need to know how to compile the kernel following that let me know. 2.6.X is a few commands shorter and I can type 'em.

The second can be found in your init scripts. If its not there, get it there.

I would not be sure that it isn't already working. My battery life doesn't seem to be as good in Linux either. My instant indicator that ACPI is not working in Linux is that my Laptop gets hot, VERY HOT. At least before it shuts itself down.


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