Date: Tue, 01 May 2007 14:26:04 -0500 From: Eric Anderson <anderson@freebsd.org> To: Nate Lawson <nate@root.org> Cc: freebsd-acpi@freebsd.org Subject: Re: CPU temp AC vs Battery Message-ID: <4637944C.5000709@freebsd.org> In-Reply-To: <46378F75.6020007@root.org> References: <4630BCC4.10601@freebsd.org> <4637860D.8060603@freebsd.org> <46378F75.6020007@root.org>
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On 05/01/07 14:05, Nate Lawson wrote: > Eric Anderson wrote: >> On 04/26/07 09:52, Eric Anderson wrote: >>> Hi everyone, >>> >>> I've just noticed something very odd. On my Dell D820 laptop, when >>> running off AC power from boot, by idle CPU temperature sits around 58C. >>> >>> If I unplug the power, and then plug it back in again, it will drop >>> down to around 49-50C within a minute or two. It will stay there. >>> With or without powerd running. >> >> Another note: >> >> If I boot up without the AC adapter plugged in, it still runs hot. Only >> the transition from AC -> battery seems to make a difference. >> >> Anyone with some ideas?? > > Does the temp change at all or is it stuck at 58C? If stuck, maybe the > reading is incorrect and something in the AC line transition kicks the > EC back into operation. The temp does change, about 10C. > If it changes, then perhaps something is generating a lot of interrupts > (perhaps SMI or SCI irqs). More debug prints from the acpi-ca Notify > routine caller would help zero in. > Just add some printfs in there and recompile/reboot? Eric
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