Date: Tue, 01 May 2007 15:12:50 -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: <46379F42.3040700@freebsd.org> In-Reply-To: <4637944C.5000709@freebsd.org> References: <4630BCC4.10601@freebsd.org> <4637860D.8060603@freebsd.org> <46378F75.6020007@root.org> <4637944C.5000709@freebsd.org>
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On 05/01/07 14:26, Eric Anderson wrote: > 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. Hmm.. Seems also that my performance is reduced quite a bit. Doing some rather lame CPU benchmarks (ubench -c -s), seems that I get a score of around 200k on AC before unplugging, and about 104k after unplugging/plugging back in. It definitely feels slower too.. I don't see any speed changes or anything obvious in sysctl output. >> 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 > _______________________________________________ > freebsd-acpi@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-acpi > To unsubscribe, send any mail to "freebsd-acpi-unsubscribe@freebsd.org"
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