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Bug#470474: cpufrequtils: Laptop limited to 1.2GHz vs 2.2GHz when no battery, running on AC only.



On Fri, 2010-04-23 at 10:11 -0400, Greg Folkert wrote:
> Okay, I can't get reportbug to work properly at the moment, it fails to
> reach BTS for linux-2.6
> 
> 
> In any case, here is the details I have now:
> 
> Package: linux-2.6
> Version: 2.6.32+25
> Severity: normal
> 
> Running linux-image-2.6.32-3-686-bigmem 2.6.32-9, this problem is better
> without a battery in the battery slot, giving me 1.6GHz.
> 
> Problems though, is that now the machine is preferring 1.6GHz now for
> everything, no matter what power profile I give it. No matter what I try
> to force. Sometimes it even locks at 800MHz. I can see the policy change for
> a few milliseconds, but goes right back to 1.6GHz
> 
> Plus the 2.6.32 kernel screws up the X rendering and makes it feel like 
> I'm back in 1994 running CDE on OSF/1 box, using XDMCP. Lethargic response
> times, likely due to the GEM system changes.
> 
> I've switched back to linux-image-2.6.31-rc4-686-bigmem 
> 2.6.31~rc4-1~experimental.1~snapshot.14067 as my kernel in use. This gives
> *MUCH* *MUCH* better CPU speed results *AND* the X renders fast and light, 
> like it should. Since the updates to cpufreq* packages (and other things I am sure)
> I am running at 2.2GHz all the time (without the battery in, or out ON AC only)
[...]

Please report this upstream at <https://bugzilla.kernel.org> under
product 'Power Management, component 'cpufreq'.  Let us know the bug
number so that we can track it.

Ben.

-- 
Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.

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