Date: Tue, 3 Jun 2008 23:47:36 +0200 From: Martin <nakal@web.de> To: freebsd-stable@FreeBSD.org Cc: koitsu@FreeBSD.org Subject: Re: Lenovo Thinkpad t61p and FreeBSD? Message-ID: <20080603234736.65737e6c@zelda.local> In-Reply-To: <20080603122218.GA69827@eos.sc1.parodius.com> References: <18501.12329.638264.761303@cs.wpi.edu> <20080603122218.GA69827@eos.sc1.parodius.com>
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On Tue, 3 Jun 2008 05:22:18 -0700 Jeremy Chadwick <koitsu@FreeBSD.org> wrote: > Based on my experiences with my workplace-provided T60p, it's safe to > say I'll never recommend a Lenovo product. The temperatures of these > laptops are absolutely insane, supported by an incredibly loud fan. > I'm not interested in a product that can have a GPU reaching > temperatures of almost 70C **while idling**. Hallo, I can confirm this. I've got a T60p Lenovo Thinkpad here. This laptop is very lazy with speeding up the fan, when using automatic fan settings. I've got CPU temperatures up to 101=C2=B0C here, while compiling world or ports. At this point the laptop powers off. The fan works. I checked it. The fan is far too slow, when setting it to highest level: dev.acpi_ibm.0.fan_speed: 3745 dev.acpi_ibm.0.fan_level: 7 dev.acpi_ibm.0.fan: 0 I'm not sure, but I think I've seen it at 4300 and almost 5000 rpm earlier at high temperatures around 90=C2=B0C. Today it always stays below 4000 rpm, even at 100=C2=B0C. Second problem is that the VGA sits under the same heat sink as the CPU. The GPU or chipset is constantly at 75=C2=B0C minimum, because FreeBSD-powerd does not adjust the voltage settings of the VGA and always runs it at full power. This heats up the CPU additionally. I have a small script that automatically adapts the CPU speed, so it stays below 75=C2=B0C while compiling big things. Optionally one can set the CPU speed to 1667MHz manually while compiling. --=20 Martin
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