Date: Fri, 18 Jul 2003 19:24:20 +0200 From: Tobias Roth <roth@iam.unibe.ch> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: mobile@freebsd.org Subject: Re: dmesg showing wrong frequency (IBM T30) Message-ID: <20030718172420.GA469@speedy.unibe.ch> In-Reply-To: <46000.1058545347@critter.freebsd.dk> References: <20030718141239.GB19817@speedy.unibe.ch> <46000.1058545347@critter.freebsd.dk>
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On Fri, Jul 18, 2003 at 06:22:27PM +0200, Poul-Henning Kamp wrote: > What's "wrong" here is that the BIOS/ACPI firmware in your laptop > runs your CPU at a reduced rate in order to make the battery last > longer. it should NOT do this. I set the bios to disable speedstep and to 'max performance' while on AC. also, i run apm and not acpi. > It can also be that the case that the "cooling solution" (ie: fans, > fins etc) does not work well enough and the ACPI code has slowed > down the CPU in order to not melt anything [*]. that was also one of my suspicions. the fan is brand new, ibm replaced it after i sent the unit in because of heat problems. could it be that the design of this laptop is bad, when it comes to heat conduction? shouldn't i get the full 1.8GHz when running on AC, and be able to do a buildworld without any sig11 on a hot summer day (~28 deg c room temp). those sig11 are just another thing that may be connected to my low cpu freq... > [*] Known in certain circles as a "Warnering your laptop" :-) haha, i saw those pics, looked scary!
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