Date: Wed, 20 Feb 2008 22:51:38 +0100 From: Johannes Dieterich <dieterich.joh@googlemail.com> To: Kevin Oberman <oberman@es.net>, freebsd-acpi@freebsd.org Subject: Re: [RFC] Patch to enable temperature ceiling in powerd Message-ID: <47BCA0EA.4080508@gmail.com> In-Reply-To: <20080220213200.BD12E4500F@ptavv.es.net> References: <20080220213200.BD12E4500F@ptavv.es.net>
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First, thanks for your reply! Kevin Oberman wrote: >> Date: Wed, 20 Feb 2008 22:10:41 +0100 >> From: Johannes Dieterich <dieterich.joh@googlemail.com> >> Sender: owner-freebsd-acpi@freebsd.org >> >> Alexandre "Sunny" Kovalenko wrote: >>> On Sun, 2008-02-17 at 14:40 +0100, Johannes Dieterich wrote: >>>> Hi, >>>> some not so nice news: >>>> >>>> That still holds true. Unfortunately portupgrade gcc overheats it again. >>> You might want to do >>> >>> sysctl hw.acpi.thermal.user_override=1 >>> sysctl hw.acpi.thermal.tz1._PSV=85C >>> >>> and see if this gets you through the gcc compilation. >> for a long long time it looked very good. But then it again overheated.I >> might want to stress again that it happened out of a sudden. sysctl >> dev.cpu reports 83-87 degrees for a long time and then it SUDDENLY shuts >> down saying it is over 127 degrees. The workload between those two data >> points has not changed. > > This is sounding like a hardware problem. > > On almost all modern systems, the CPU temperature is read from a single > junction on the silicon of the CPU. If it makes sudden, inexplicable > jumps, this implies that either the junction on the chip or the support > hardware on the mobo (this is analog stuff) is misbehaving. > > It is possible that something is causing BIOS to handle the values > incorrectly, but that would seem very unlikely to me. In general, I am willing to believe these things. There is a but though. The problem appeared when upgrading from 6.2 to 7.0. OK, hardware breaks and coincidences happen. But I tested later with an openSUSE and a Knoppix Live CD (OK, JUST a LiveCD) and a stress test and it never went over 79 degrees. But it reproducibly happens with FreeBSD 7.0 and also there just under load (which puts the temperature anyway to 85 degrees). I do lack an install of a Linux to test these issues there because the notebook is my productive system at the moment. So do you think this issue would not show with a Linux LiveCD but an install? Is it worth in your opinion putting the hard drive out and finding another one to install a quick SuSE/RedHat/whatever for testing? Thanks, Johannes
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