[ltp] Re: tpfand configuration for an X200s

[John Li]

On Tue, Dec 02, 2008 at 12:13:37PM -0200, Henrique de Moraes Holschuh wrote:
> On Tue, 02 Dec 2008, Christoph Bier wrote:
> >
> > On my wife's two year old R60 I don't have battles with the fan ... Is
> > the X200s just too new?
>
> Lenovo objects to user fan control.  They may have changed the interface.

FWIW, I'm having issues with my X200, too. I can control the fan
through thinkpad-acpi when I load it with the fan_control option,
though. I haven't used tpfand or any other piece of software to muck
with it. I'd rather not limit the fan speed, though (more below).

Maybe we have the same issue. For me, the fan revs up pretty loudly
(from essentially inaudible to not-quiet) after some use, when one of
the sensors gets to ~44, I believe. It stays at that speed, even if
the temperature comes back down. Sometimes, unplugging it from mains
"resets" it so the fan slows down, but eventually it speeds up again.

Being stuck at a high speed seems to a bug somewhere, but the bottom
of my X200 (around the ram) does /seem/ to get warmer, faster with
Linux compared to Vista. Also on Vista, the fan only gets as loud when
doing something pretty CPU intensive for a while, and quickly slows
back down when idling. I don't have equipment to do empirical tests,
unfortunately, but does it make sense for Linux to be doing something
differently that causes a non-trivial temperature increase?


Thanks!
John