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Re: Powerbook produces a lot more heat after kernel upgrade



On Sun, 2004-11-21 at 11:55 +1100, Benjamin Herrenschmidt wrote:
> On Sat, 2004-11-13 at 09:57 +0100, Richard Hult wrote:
> > Hi,
> > 
> > > Today I compiled the 2.6.9 stock kernel + Ben's suspend
> > > patch. However I am experiencing a lot of extra heet production as
> > > opposed to the 2.6.8.1 kernel. I have locked my cpu at the lowest
> > > frequency (it is fast enough), and with the 2.6.8.1 the fan was
> > > almost always off except with excessive loads. But while using
> > > the 2.9.6 the fans have to cool down my albook a lot more.
> > > 
> > > I haven't made any significant change to my kernel config. I have
> > > a PowerBook5,4 running at 1,33 MHz (well 666 MHz actually).
> > 
> > I can confirm this on my PowerBook 5,4 1.5GHz. Although the temperature 
> > rise happened when upgrading from the debian kernel package for 2.6.7 to 
> > 2.6.8. The idle temperature goes up ~4 degrees celcius, just by booting 
> > with 2.6.8 or later instead of 2.6.7. A friend with the same model is 
> > also experiencing this.
> 
> That's weird... I don't have an explanation off-hand.
> 
> Ben.
Hm... I havent researched it but I said to a friend of mine about 15
minutes ago "somehow the temperature management seems to get worse". *g*
In other words - I had the same feeling. (Running Ubuntu 2.6.8.1 now -
preparing to test the sleep patch)

Timo



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