Date: Wed, 28 May 2008 11:05:50 -0500 From: "Scot Hetzel" <swhetzel@gmail.com> To: eculp <eculp@encontacto.net> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: overheating problem with Acer Aspire 5520-5679 AMD-64 Message-ID: <790a9fff0805280905n28cd6223i9cb3e52c8db96f04@mail.gmail.com> In-Reply-To: <20080528062731.97912c9n9sekrrtw@intranet.encontacto.net> References: <20080528062731.97912c9n9sekrrtw@intranet.encontacto.net>
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On 5/28/08, eculp <eculp@encontacto.net> wrote: > I am running up to date current amd64 and am having issues with the laptop > just stopping with no warning and it seems to be due to overheating. If I > keep the room temp cooler or keep air circulating under it, it doesn't > happen. > > +ACPI Error (psparse-0626): Method parse/execution failed > [\\_TZ_.THRM._TMP] (Node 0xffffff0001212920), AE_NO_HARDWARE_RESPONSE > +acpi_tz0: error fetching current temperature -- AE_NO_HARDWARE_RESPONSE > +acpi_ec0: EcRead: failed waiting to get data > +ACPI Exception (evregion-0529): AE_NO_HARDWARE_RESPONSE, Returned by > Handler for [EmbeddedControl] [20070320] > > I'm thinking that maybe I should change the cpu speed and or other varibles > using sysctl until acpi can do it automatically. > > Any suggestions on variables to play with or other solution? > I have been experiencing this problem also. The solutions I have come up with are: 1. Hang Laptop off table by 4 inches to allow more air to reach the bottom vent. 2. Change dev.cpu.0.freq to a lower value dev.cpu.0.freq: 1791 dev.cpu.0.freq_levels: 1990/35000 1791/29200 1592/24200 796/7900 3. Direct a Fan at the bottom vent to force more air thru the vent. I also installed sysutils/k8temp to monitor the temp while compiling: # while true ; do k8temp ; sleep 30 ; done CPU 0 Core 1 Sensor 0: 65c CPU 0 Core 1 Sensor 0: 67c If the temp goes above 89c, the computer will lock up. When I notice this, lowering dev.cpu.0.freq to a lower value is enough to allow the compile to finish. I have also added the following to sysctl.conf, but it doesn't seem to affect the thermal lock up problem. hw.acpi.thermal.user_override=1 hw.acpi.thermal.tz0._PSV=3432 hw.acpi.thermal.tz0._HOT=3600 hw.acpi.thermal.user_override=0 This changes _PSV from 90C to 70C, and sets _HOT. # sysctl hw.acpi.thermal hw.acpi.thermal.min_runtime: 0 hw.acpi.thermal.polling_rate: 10 hw.acpi.thermal.user_override: 0 hw.acpi.thermal.tz0.temperature: 0.0C hw.acpi.thermal.tz0.active: -1 hw.acpi.thermal.tz0.passive_cooling: 1 hw.acpi.thermal.tz0.thermal_flags: 0 hw.acpi.thermal.tz0._PSV: 70.0C hw.acpi.thermal.tz0._HOT: 86.8C hw.acpi.thermal.tz0._CRT: -1 hw.acpi.thermal.tz0._ACx: 40.0C -1 -1 -1 -1 -1 -1 -1 -1 -1 hw.acpi.thermal.tz0._TC1: 2 hw.acpi.thermal.tz0._TC2: 5 hw.acpi.thermal.tz0._TSP: 50 Scot
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