Date: Sun, 04 Apr 2010 16:53:39 +0100 From: Bartosz Fabianowski <freebsd@chillt.de> To: "Alexandre \"Sunny\" Kovalenko" <gaijin.k@ovi.com> Cc: freebsd-acpi@freebsd.org, Ian Smith <smithi@nimnet.asn.au> Subject: Re: Spurious thermal shutdowns on Dell Studio 1557 Message-ID: <4BB8B603.60902@chillt.de> In-Reply-To: <1270341153.1455.81.camel@RabbitsDen> References: <4BB69279.6060005@chillt.de> <20100403152134.V35463@sola.nimnet.asn.au> <4BB74BC4.9070409@chillt.de> <20100404012906.I35463@sola.nimnet.asn.au> <1270308642.1455.10.camel@RabbitsDen> <4BB764CC.60500@chillt.de> <1270334546.1455.45.camel@RabbitsDen> <4BB7C937.9050106@chillt.de> <1270337076.1455.60.camel@RabbitsDen> <4BB7D71C.7080303@chillt.de> <1270341153.1455.81.camel@RabbitsDen>
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> If you still have old kernel, you can try booting it and looking at > the system performance with some kind of CPU-bound benchmark. Unfortunately, the old kernel is long gone. > Theoretically, your laptop should be able to run with CPU stuck at > its highest frequency without shutting down. I agree. This is precisely what I am trying to achieve. > ISTR there are few CPU frequency drivers that could use some > disabling. Disabling p4tcc changed nothing. Disabling apci_throttle as well finally reduced the frequencies from 13 to 6. I have yet to see what effect this will have on system performance. > Does 'hw.acpi.thermal.tz1.active' show value of '0' an this point? > Does it go back to '1' when temperature drops below 71C? Does it ever > show '-1'? The value varies between 0 and 1. When the machine is idling, temperature tends to drop to 55°C and then hover there. As this is exactly the lowest _ACx threshold, active stays at 0. Just as I was writing this e-mail, the temperature finally reached 54°C and active went to -1. The fan is still on, however. - Bartosz
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