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    SubjectRe: 2.6.21-rc5: Thinkpad X60 gets critical thermal shutdowns
    Date
    On Sunday 01 April 2007 20:57:57 Kyle Moffett wrote:
    > On Mar 31, 2007, at 02:36:08, Jeremy Fitzhardinge wrote:
    > > When I run 2.6.21-rc5 + Andi's x86 patches + paravirt_ops patches,
    > > I've been getting my machine shut down with critical thermal
    > > shutdown messages:
    > >
    > > Mar 30 23:19:03 localhost kernel: ACPI: Critical trip point
    > > Mar 30 23:19:03 localhost kernel: Critical temperature reached (128
    > > C), shutting down.
    > > Mar 30 23:19:03 localhost kernel: Critical temperature reached (128
    > > C), shutting down.
    > > Mar 30 23:19:03 localhost shutdown[19417]: shutting down for system
    > > halt
    > >
    > > and the machine does feel pretty hot. Interestingly, when the
    > > machine reboots, the fan spins up to a noticeably higher speed, so
    > > it seems that maybe something is getting fan speed control wrong.
    >
    > Well, 128C is more than hot enough to boil water and well above the
    > thermal tolerances of most CPUs, so I would imagine that were your
    > CPU actually that hot it wouldn't be capable of printing the
    > "Critical temperature reached" messages, let alone properly rebooting.

    IIRC a MSI Megabook S270 (I formerly owned) BIOS notifies this
    "Critical temperature reached (128C)" when the battery run empty
    when the OS did no action due to battery low indications. I guess
    the BIOS people thought this is a good last resort to let the OS
    really shutdown before the box just turns off.

    Yours,

    --
    René Rebe - ExactCODE GmbH - Europe, Germany, Berlin
    http://exactcode.de | http://t2-project.org | http://rene.rebe.name
    +49 (0)30 / 255 897 45
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