Date: Mon, 21 Dec 2009 23:29:43 -0800 (PST) From: James Phillips <anti_spam256@yahoo.ca> To: freebsd-current@freebsd.org Subject: Re: Systems running hot? Message-ID: <296806.84549.qm@web65508.mail.ac4.yahoo.com> In-Reply-To: <20091221215204.AC4EC1065818@hub.freebsd.org>
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=0A=0A> Date: Mon, 21 Dec 2009 13:26:26 +0100=0A> From: Dag-Erling Sm?rgrav= <des@des.no>=0A> Subject: Re: Systems running hot?=0A> To: Doug Barton <do= ugb@FreeBSD.org>=0A> Cc: freebsd-current@freebsd.org=0A> Message-ID: <861vi= osebx.fsf@ds4.des.no>=0A> Content-Type: text/plain; charset=3Dutf-8=0A> =0A= > Doug Barton <dougb@FreeBSD.org>=0A> writes:=0A> > In the last weeks (I ge= nerally update to the latest=0A> HEAD daily) It=0A> > seems that my -curren= t laptop is running hot=0A> temperature wise, even=0A> > when it's idle, or= nearly so. The temperature sensor=0A> (via wmbsdbatt)=0A> > generally stay= s in the 80s C, as opposed to the 70s,=0A> and the fan is=0A> > regularly o= n its "medium" speed as opposed to the low=0A> speed.=0A=0AAs far as I can = gather, Intel considers the relationship between sensor readings and actual= temperatures a trade secret. You have to take those numbers with a grain o= f salt.=0A=0AIf you look at the Hardware monitoring screen in the BIOS you = may notice the temperature readings are unitless. I don't think that is an = accident, though they roughly correspond to Celsius temperatures.=0A=0AFor = a DG31PR based desktop (latest (0068) BIOS revision) I recently observed a = cold boot CPU temp starting at 24 and climbing to 30 before I got bored. Th= e reported system temperature went from 65534 -> 65535 -> 0 -> ... -> 4 bef= ore I got bored. Temperature probe in case rose from 295K -> 304K (+-1% ~ 2= 2C -> 31 C)(not all measurement guaranteed to be simultaneous)=0A=0A> =0A> = The maximum operating temperature for a Core 2 Duo is 75=0A> C.=A0 The idle= =0A=0ATrue, but ACPI reporting 80C does not make it so.=0A=0ARegards,=0A=0A= James Phillips=0A=0A=0A=0A=0A ________________________________________= __________________________=0AYahoo! Canada Toolbar: Search from anywhere on= the web, and bookmark your favourite sites. Download it now=0Ahttp://ca.to= olbar.yahoo.com.
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