Date: Sat, 19 Jul 2003 10:54:03 +0200 From: Tobias Roth <roth@iam.unibe.ch> To: Bruce Cran <bruce@cran.org.uk> Cc: questions@freebsd.org Subject: Re: dmesg showing wrong frequency (IBM T30) Message-ID: <20030719085403.GB2469@speedy.unibe.ch> In-Reply-To: <20030718204859.GA65650@buffy.brucec.backnet> References: <20030718141239.GB19817@speedy.unibe.ch> <46000.1058545347@critter.freebsd.dk> <20030718172420.GA469@speedy.unibe.ch> <20030718204859.GA65650@buffy.brucec.backnet>
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On Fri, Jul 18, 2003 at 09:48:59PM +0100, Bruce Cran wrote: > On Fri, Jul 18, 2003 at 07:24:20PM +0200, Tobias Roth wrote: > > 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. > > > > That's probably the problem. For some reason, certainly on my Dell, disabling > SpeedStep throttles the CPU down to 1.2GHz on bootup, from its full 2.0GHz. > Nothing the OS can do will change it. Enabling SpeedStep means that FreeBSD > sees the full 2.0GHz. I've also heard about someone whose Dell had a broken > BIOS, which meant that the CPU could never run at full speed, but was always > running at 60%. Upgrading the BIOS was the solution in that case. interesting. i have cycled through all the different bios options, but it is always the same 1.2 GHz. i recently upgraded to the latest bios, so i probably will have to wait to try a new bios. meanwhile, the laptop is going back to ibm anyway because of its overheating problem and the broken second ram slot. i will tell them to check out the cpu/bios as well.
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