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changing cpu speed on laptop

This is a discussion on changing cpu speed on laptop within the Slackware Linux Support forums, part of the Unix Operating Systems category; --> My laptop has a 700/550 pIII cpu in it running Slackware 9.1 but it only seems to be running ...


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  #1 (permalink)  
Old 02-18-2008, 08:23 PM
Hugh Lutley
 
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Default changing cpu speed on laptop

My laptop has a 700/550 pIII cpu in it running Slackware 9.1 but it only
seems to be running at 550mhz. Since the battery is screwed and it is
only run off the mains is there any setting in Linux to get it to
run at 700mhz??

Thanks

Hugh


--
/* Hugh Lutley aKa Spewy
* This message was created on either
* Aurora 1.0 Linux on Sparcstation 20 <- 2 sm71 SuperSparc, 192mb ram ->
* Mandrake 9.2 Linux on Athlon XP <- Gnome 2.4 rulez KDE ->
* Slackware 9.1 Linux on PIII <- Command line rulez ->
* NO GOING BACK TO WINDOWS THIS TIME!!!!!!!
*/
(created in ViM)

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  #2 (permalink)  
Old 02-18-2008, 08:23 PM
Eef Hartman
 
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Default Re: changing cpu speed on laptop

Hugh Lutley <hugh@richiedeleltethisbitkotzen.com> wrote:
> My laptop has a 700/550 pIII cpu in it running Slackware 9.1 but it only
> seems to be running at 550mhz. Since the battery is screwed and it is
> only run off the mains is there any setting in Linux to get it to
> run at 700mhz??


What does "cat /proc/cpuinfo" return?
Especially the "cpu MHz" line. If that value is wrong, you should go
into your bios (which is different for each machine/laptop) and try
to find out where it reports ITS speed for the cpu, Linux is getting
it from there (and only the bios will know how to change it).
--
************************************************** ******************
** Eef Hartman, Delft University of Technology, dept. EWI/TW **
** e-mail: E.J.M.Hartman@math.tudelft.nl, fax: +31-15-278 7295 **
** snail-mail: P.O. Box 5031, 2600 GA Delft, The Netherlands **
************************************************** ******************
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  #3 (permalink)  
Old 02-18-2008, 08:24 PM
David Filion
 
Posts: n/a
Default Re: changing cpu speed on laptop

Hugh Lutley wrote:
> My laptop has a 700/550 pIII cpu in it running Slackware 9.1 but it only
> seems to be running at 550mhz. Since the battery is screwed and it is
> only run off the mains is there any setting in Linux to get it to
> run at 700mhz??
>
> Thanks
>
> Hugh
>
>


Just change it in the computers bios.

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  #4 (permalink)  
Old 02-18-2008, 08:25 PM
AthlonRob
 
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Default Re: changing cpu speed on laptop

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Hash: SHA1
NotDashEscaped: You need GnuPG to verify this message

On Wed, 17 Dec 2003 11:34:08 +0000, Hugh Lutley <hugh@richieDELELTETHISBITkotzen.com> wrote:
> My laptop has a 700/550 pIII cpu in it running Slackware 9.1 but it only
> seems to be running at 550mhz. Since the battery is screwed and it is
> only run off the mains is there any setting in Linux to get it to
> run at 700mhz??


I'd upgrade to kernel 2.6.0. Or patch 2.4.23 for cpufreq support.

Either of those options will give you cpufreq support in the kernel,
which will allow you to dynamically set the speed of the processor via
a nice /proc or /sys interface, with user-land utilities available to
set it based on CPU load. It's good stuff.

Note if it is a Dell laptop, you may be unable to use any but the acpi
drivers to change the CPU speed. I'm not sure exactly why and those who
do know exactly why seem to be bound by Dell and/or Intel NDAs.

--
Rob | If not safe,
Email and Jabber: | one can never be free.
athlonrob at axpr dot net |
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