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Operating Systems Linux Ubuntu power management in ubuntu for laptop Post 302442989 by presul on Friday 6th of August 2010 06:43:01 AM
Old 08-06-2010
power management in ubuntu for laptop

Hi

I have the following problem, when I try to work on battery in my laptop, ubuntu consumes power very rapidly and after couple of minuts my laptop is out of battery power.
Previosly had win xp on that machine and win was able to manage battery power much better then linux.

Is there any way I can improve it under linux ?


thx for help.
 

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PMSET(1)						    BSD General Commands Manual 						  PMSET(1)

NAME
pmset -- modify power management settings SYNOPSIS
pmset [-a | -b | -c] [dim minutes] [spindown minutes] [sleep minutes] [womp 1/0] [ring 1/0] [autorestart 1/0] [dps 1/0] [reduce 1/0] [powerbutton 1/0] [lidwake 1/0] [acwake 1/0] [boot] pmset -g [disk | live | cap | sched] DESCRIPTION
pmset changes and reads power management settings such as idle sleep timing, wake on administrative access, automatic restart on power loss, etc. SETTING
The -a, -b, -c flags determine whether the settings apply to battery (-b), charger (wall power) (-c), or all (-a). Use a minutes argument of 0 to set the idle time to never. pmset must be run as root. The boot argument tells power management that system bootup is complete. Loginwindow handles this on a normal Mac OS X system. GETTING
The -g flag outputs the settings currently in use (same as -g live ). -g disk will tell you the settings on disk. -g cap will tell you which power management features the machine supports. -g sched will show scheduled startup/wake and shutdown/sleep events. ARGUMENTS
dim - display dim timer (value in minutes) spindown - disk spindown timer (value in minutes) sleep - system sleep timer (value in minutes) womp - wake on ethernet magic packet (value = 0/1) ring - wake on modem ring (value = 0/1) autorestart - automatic restart on power loss (value = 0/1) dps - dynamically change processor speed based on load (value = 0/1) reduce - reduce processor speed (value = 0/1) powerbutton - sleep the machine when power button is pressed (value = 0/1) lidwake - wake the machine when the laptop lid(or clamshell) is opened (value = 0/1) acwake - wake the machine when power source (AC/battery) is changed (value = 0/1) OTHER ARGUMENTS
These arguments don't directly affect power management settings: boot - tell the kernel that system boot is complete EXAMPLES
pmset -b dim 5 pmset -a dim 10 spindown 10 sleep 30 womp 1 pmset -g live FILES
All changes made through pmset are saved in a persistent preferences file (per-system, not per-user) at /Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist pmset modifies the same file that System Preferences Energy Saver modifies. Darwin August 19, 2002 Darwin
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