Date: Fri, 09 Feb 2001 11:36:42 +0100 From: "Jose M. Alcaide" <jose@we.lc.ehu.es> To: Greg Lehey <grog@lemis.com> Cc: "Matt W." <kmx@egatobas.org>, misc@openbsd.org, mobile@FreeBSD.ORG Subject: Re: Inspiron fan problems (was: laptop cpu fan) Message-ID: <3A83C83A.835A5C37@we.lc.ehu.es> References: <3A8237D1.1196D4B9@egatobas.org> <20010209111548.B16260@wantadilla.lemis.com>
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Greg Lehey wrote: > > [originally posted to misc@OpenBSD.org; adding mobile@FreeBSD.org] > > On Thursday, 8 February 2001 at 0:08:17 -0600, Matt W. wrote: > > I've got a Dell Inspirion 5000e and was wondering if there is anyway to > > get obsd 2.8 to run a nop loop in the background when the processor > > isn't being used. The reason i ask this is the cpu fan is on constantly > > even when nothing is happening. > > I've noticed a similar problem with my Inspiron 7500 running FreeBSD. > I think it's a bug in the OS. What I'm observing is that after > booting the fan will be off, but if at some time the system gets hot > enough to turn on the fan, it never goes off again. APM does work on > the 7500, and if I suspend and resume, the fan goes on immediately on > resume, even though the system is cool. The only way to stop it is to > reboot. Has anybody else noticed this? Me too, using an Inspiron 3700 under FreeBSD 4.2. However, after the fan has been working for a while, I can stop it suspending and resuming inmediately. What I find strange is that the fan turns on few hours after booting the system, even when it has been mostly idle all the time. > A NOP loop won't make the processor run any cooler. A HLT instruction > will, and that's what FreeBSD does, at any rate. I'd be surprised if > OpenBSD didn't do the same thing. I wonder why apm_cpu_idle() (in sys/i386/apm.c) is referenced from nowhere in the kernel. -- JMA ****** Jose M. Alcaide // jose@we.lc.ehu.es // jmas@FreeBSD.org ****** ** "Beware of Programmers who carry screwdrivers" -- Leonard Brandwein ** To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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