[ltp] Overheating T500

Henrique de Moraes Holschuh linux-thinkpad@linux-thinkpad.org
Fri, 14 Dec 2012 11:50:00 -0200

On Fri, 14 Dec 2012, Julien Iguchi-Cartigny wrote:
> > If it does, the thinkpad is defective, and needs to be repaired.
> I think the best way to show that it is not a hardware problem but a bug
> in the kernel is to resinstall ubuntu (or wahtever distribution) with
> kernel < 3.0. If the computer does not overheat this is a kernel bug.

Thinkpads are supposed to take care of themselves without help of the ACPI
O.S., but they are *very* robust.  Defects that would have most other
laptops crashing and burning all the time, become an annoyance only when
doing heavy workloads in a thinkpad.

Also, when everything is perfect, the OS does so much work to avoid
overheating, that you'd not notice the defect (but your laptop would be
working with far less performance).  THIS has not happened to thinkpads
lately, their ACPI tables just don't play nice with the Intel ACPICA
controllers, and I have no idea who is wrong in this one.

Lenovo sometimes play fast and loose with ACPI tricks to keep the box within
its thermal and power envelopes, but on the T-, X- and W-series, it really
shouldn't need performance-reducing tricks unless you are working on a hot

So yes, it could very well be a kernel bug.  But it is far more likely that
you have a thermal interface crack, or some other manufacturing defect that
shows up after some use.

  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh