[ltp] Weird CPU fan problem on T400, any help appreciated.

[Mark Altern]

Oh no, it is working normally for a few hours this time, but after I
played a HD trailer from apple's site, and a minute after I turn it
off this time, the fan kick in from 1800rmp to 2800rmp with no reason,
this time the CPU temp is barely 41C,

The Old problem come back!!! Now I really have no idea, and what
possibly could trigger this bad behavior? Please further help is still
needed.

Don't hesitate to give me any further suggestion. Reset CMOS works for
a few hours.
Thanks a lot.

On 8/18/10, Mark Altern <mark.altern@gmail.com> wrote:
> I dissembled my T400, disconnected CMOS battery, and by the way, I
> cleaned up the heatsink and reapplied thermal paste.
>
> Guess what, the problem disappeared. Now the fan is working normally.
> And the CPU temp and intel graphic temp both dropped (idle) by 3-4C,
> and now it is become pretty hard to push the CPU temp above 55C to
> speed up the fan, I have to open two 1080HD video, and 3 flashes from
> Youtube, and by that time the computer is stuttering and slowish, but
> the CPU temp still refuse to go up to 53C, amazing is the new thermal
> paste. Right after I turn off the programs, the temp drop back to 40s
> and fan slow down.
>
> So cheers! Hopefully, there is no more surprises. Thanks a lot guys,
> you guys are really a great help.
>
> On 8/18/10, Chris Schumann <chris@idlelion.net> wrote:
>> Uhm, what?
>>
>> On 08/18/2010 01:04 PM, Mark Altern wrote:
>>> NO, I didn't remove the BIOS battery, Let me try that and I will
>>> report back.
>>>
>>
>>> On 8/18/10, Chris Schumann <chris@idlelion.net> wrote:
>>>> On 08/17/2010 08:15 PM, Mark Altern wrote:
>>>>> Open a 1080 HD video with Totem in Ubuntu (Lucid), after playing it
>>>>>
>>>> Do you have such a video handy that we could try?
>>>>
>>>> (I'm running Fedora 12 on a T400, FWIW.)
>>>>
>>>> Chris
>>
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>