On Friday 21 April 2006 14:47, David PHAN wrote: > Stefan Srdic wrote: > > [EMAIL PROTECTED] wrote: > >> * Prepaid <[EMAIL PROTECTED]> [2006-04-21 13:42:25 -0400]: > >>> Hi all > >>> > >>> So I just recently installed Debian Etch with a 2.6 kernel on my > >>> Inspiron 600m. I got everything all working with X11 and wireless. But > >>> the issue that I'm having it the battery life in Linux is about half > >>> that of what I was getting in Windows. I have setup CPU thorottling to > >>> 50% through KDE but I still get about half the battery life that I was > >>> getting in Windows.. > >> > >> Have a look at 'cpufreqd' for dynamic scaling/throttling of the CPU > >> Also 'laptop-mode-tools' might be something for you although I've not > >> really looking into it > >> > >> Sven > > > > powernowd is much better at throttling CPU's (not just AMD's, but > > Intel's too) the cpufred. Laptop-mode-tools can also help extend battery > > life by spinning down the HDD. You might want to look into acpid or > > powersaved for general power management. > > > > The major difference that windows has over linux for power management is > > ajusting the power output to the LCD screen. I have yet to find any app > > that accomplishes just that. > > > > Stefan > > You can also have a look at cpudyn.
so many choices... Since you use KDE, you should take a look at klaptopdaemon. Try starting it by opening the KDE control centre, then navigating to "Power control" -> "Laptop Battery". In that screen you should see "Start Battery Monitor" at the bottom right of the "Battery" tab. Using klaptopdaemon you can monitor the state of your battery, but also customise some power management settings based on whether your laptop is plugged in or running on batteries. For CPU throttling, I've been using the built-in kernel CPU speed governors. No setup required. If you're running klaptopdaemon, right-click on its system tray icon, select "performance profile", then look at the list. If there's nothing there, the kernel modules are probably not loaded. As root try: modprobe cpufreq_stats modprobe cpufreq_conservative modprobe cpufreq_ondemand modprobe cpufreq_powersave modprobe cpufreq_userspace The command cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors should then show you what's available. You may need to restart klaptopdaemon afterwards to have the new governors show up in its list. You can select the governor to use from the list. You can also do it from the command line by writing its name to /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor. For instance, echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor If you're running on battery, you'll probably want to use the conservative or ondemand speed governor. You can set klaptopdaemon to automatically adjust the governor used based on whether you're running on batteries or ac. Hope that helps. Luca -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
