[Bug 37496] Critical temperature reached (255 C) when using i810

[Albert Vilella]

Public bug reported:

Affects: linux-source-2.6.15 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed


Description:
Hi,

This is a problem I have with a Sony Vaio SZ1XP. This computer has two
graphic cards, one i945GM and an NVIDIA GeForce Go 7400.

There is a switch close to the power button that will allow the user to
use the NVIDIA chip (Speed) or the Intel chip (Stamina) depending on if
one wants good graphic performance or better battery life.

When I try to load the kernel with the Intel chip, as soon as it loads
the essential modules, an acpi warning appears stating:

[bignumber.bignumber] Critical temperature reached (255 C)

And the laptop will do a controlled halt.

Somehow it seems that when using the Intel chip, the bios/acpi is giving
unrealistic thermal info, which won't let the kernel to load.

Typical: pci=noacpi or acpi=off or noapic flags don't help at all.

Any hints?

Albert.
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Critical temperature reached (255 C) when using i810
https://launchpad.net/malone/bugs/37496