* Mobile Intel Celeron 2.0 GHz with ICH4 bridge @ 2004-02-23 21:36 Keld Jørn Simonsen 2004-02-24 8:22 ` Dominik Brodowski 0 siblings, 1 reply; 3+ messages in thread From: Keld Jørn Simonsen @ 2004-02-23 21:36 UTC (permalink / raw) To: cpufreq Hi I have an Acer Travelmate 233 and I am trying to save some battery power. Is that possible with cpufreq? The CPU is a Mobile Intel Celeron 2.0 GHz and the southbridge is an Intel 82801DB 845G/GL Chipset ISA Bridge (ICH4) I run Mandrake 10.0 RC1 with kernel 2.6.2 and cpufreq 1.0.1, unfortunately I get the following message: cpufreq: Intel(R) SpeedStep(TM) for this chipset not (yet) available. Is this because I am running an outdated version of cpufreq, or just because the CPU is not recognized properly? Are there other ways to save power with this machine, on the CPU? Best regards Keld ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Mobile Intel Celeron 2.0 GHz with ICH4 bridge 2004-02-23 21:36 Mobile Intel Celeron 2.0 GHz with ICH4 bridge Keld Jørn Simonsen @ 2004-02-24 8:22 ` Dominik Brodowski 2004-02-24 16:26 ` Keld Jørn Simonsen 0 siblings, 1 reply; 3+ messages in thread From: Dominik Brodowski @ 2004-02-24 8:22 UTC (permalink / raw) To: Keld Jørn Simonsen; +Cc: cpufreq [-- Attachment #1.1: Type: text/plain, Size: 1012 bytes --] On Mon, Feb 23, 2004 at 10:36:19PM +0100, Keld Jørn Simonsen wrote: > Hi > > I have an Acer Travelmate 233 and I am trying to save some battery > power. Is that possible with cpufreq? > > The CPU is a Mobile Intel Celeron 2.0 GHz and the southbridge is an > Intel 82801DB 845G/GL Chipset ISA Bridge (ICH4) > > I run Mandrake 10.0 RC1 with kernel 2.6.2 and cpufreq 1.0.1, > unfortunately I get the following message: > cpufreq: Intel(R) SpeedStep(TM) for this chipset not (yet) available. > Is this because I am running an outdated version of cpufreq, > or just because the CPU is not recognized properly? The problem is that you have a Mobile Celeron which does not support SpeedStep. All you could get from cpufreq is Clock Throttling, (p4-clockmod), but this won't save you much in terms of battery power. > Are there other ways to save power with this machine, on the CPU? ACPI processor support with working C1 and C2 idle states [check /proc/acpi/processor/*/power ] Dominik [-- Attachment #1.2: Type: application/pgp-signature, Size: 189 bytes --] [-- Attachment #2: Type: text/plain, Size: 143 bytes --] _______________________________________________ Cpufreq mailing list Cpufreq@www.linux.org.uk http://www.linux.org.uk/mailman/listinfo/cpufreq ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Mobile Intel Celeron 2.0 GHz with ICH4 bridge 2004-02-24 8:22 ` Dominik Brodowski @ 2004-02-24 16:26 ` Keld Jørn Simonsen 0 siblings, 0 replies; 3+ messages in thread From: Keld Jørn Simonsen @ 2004-02-24 16:26 UTC (permalink / raw) To: Keld Jørn Simonsen, cpufreq On Tue, Feb 24, 2004 at 09:22:22AM +0100, Dominik Brodowski wrote: > On Mon, Feb 23, 2004 at 10:36:19PM +0100, Keld Jørn Simonsen wrote: > > Hi > > > > I have an Acer Travelmate 233 and I am trying to save some battery > > power. Is that possible with cpufreq? > > > > The CPU is a Mobile Intel Celeron 2.0 GHz and the southbridge is an > > Intel 82801DB 845G/GL Chipset ISA Bridge (ICH4) > > > > I run Mandrake 10.0 RC1 with kernel 2.6.2 and cpufreq 1.0.1, > > unfortunately I get the following message: > > cpufreq: Intel(R) SpeedStep(TM) for this chipset not (yet) available. > > Is this because I am running an outdated version of cpufreq, > > or just because the CPU is not recognized properly? > > The problem is that you have a Mobile Celeron which does not support > SpeedStep. All you could get from cpufreq is Clock Throttling, > (p4-clockmod), but this won't save you much in terms of battery power. OK, understood. > > Are there other ways to save power with this machine, on the CPU? > ACPI processor support with working C1 and C2 idle states [check > /proc/acpi/processor/*/power ] As I can see it, my system already goes in autohalt. The normal system power drainage is about 38 W, but I can measure the power use to about 18 W when I do nothing, (with my harddisk in sleep, and my screen turned to lowest intensity). I understand that throttling is actually putting the CPU off power. I would like to be able to shut off just the CPU, getting a savings of about 7,5 W. Is this possible, is there a way to shut off the CPU while having the screen and ram on power? What commands should I issue, or is this something I need to make a program to do? The idea is to shut off the CPU after it being idle for about a second, and resuming the operation next time I touch the keyboard or the mouse. 1 second would allow normal typing or normal mouse movement to perform as usual, while having the screen lit would give the impression of the machine being on. Going from 18 W to about 11 W would give me about 2 hours more of battery time. best regards keld ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2004-02-24 16:26 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2004-02-23 21:36 Mobile Intel Celeron 2.0 GHz with ICH4 bridge Keld Jørn Simonsen 2004-02-24 8:22 ` Dominik Brodowski 2004-02-24 16:26 ` Keld Jørn Simonsen
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