Date: Sun, 21 Dec 2008 12:04:27 +0100 From: Martin <nakal@web.de> To: Nathan Lay <nslay@comcast.net> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: Very serious cooling issues CURRENT/STABLE Message-ID: <20081221120427.2dfde4b1@zelda.local> In-Reply-To: <494DDA1B.6050206@comcast.net> References: <494DDA1B.6050206@comcast.net>
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Am Sun, 21 Dec 2008 00:54:35 -0500 schrieb Nathan Lay <nslay@comcast.net>: > Hi list(s) > Early in the year I noticed CURRENT failed to cool my frankenstein=20 > Thinkpad T40 (built from T40/40p parts) under load. The system would=20 > shut down from critically high temperatures while building a port. I=20 > did nothing special with ACPI. I thought nothing of it since, after=20 > all, I rebuilt a broken T40 from T40p parts. Today, however, I > noticed that a very recent STABLE build failed to keep my T43 cool > while building ports. It reached temperatures of 97, 98, 99C. Hallo Nathan, I can confirm this on a T60p. My notebooks shuts down since I use 7.0 at 101=C2=B0C. I have written a script that throttles the CPU if it gets above 75=C2=B0C. I have to use it when I'm building world or ports. Btw, I have reported the problem here a some time ago [1]. I have received some feedback that IBM/Lenovo uses wrong cooling strategy placing the CPU and the VGA under one single cooled surface and using too much thermal grease. On the other hand I have also emphasized that the fan should be able to have about 800rpm more at the temperature of 80=C2=B0C, but this has been ignored so far. This is why I have never had any problems running "the other common operating systems" and I have put them under heavy load. They don't exceed 85=C2=B0C. > It > used to reach a max temperature of 80C while building a port (idling > temperature is ~ 45C). It behaved normally from 5.3 all the way > through 7.0. To remedy both issues, I had to underclock the > processor (via dev.cpu) and force the fan to its highest (I'm running > 533MHz shy of the processor's full potential, with a fan level of 7 > to keep the temperature at ~75C). I have one further hint for you. The VGA is running very hot on FreeBSD (~75=C2=B0C when idle), because it is not able to throttle the GPU and its voltage. Maybe you've had a working setup for your GPU before and you even did not notice? Did you change your Xorg drivers? > I've always suspected FreeBSD's > ACPI didn't work properly on Thinkpad T series laptops (I have T40, > T41, T42 and T43) as it could never fully use the fan (Windows XP can > rev the fan far higher than acpi_ibm's level 7). Between STABLE and > CURRENT...something seems very wrong. These systems never had > cooling issues with FreeBSD before. The fan is running definitely too slow. On my system, too. Thanks, Martin References: [1] http://lists.freebsd.org/pipermail/freebsd-stable/2008-June/042812.html
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