linux-kernel - Re: 2.6.27-rc0 Power Bugs with HP/Compaq Laptops

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Date:	Thu, 4 Sep 2008 21:20:13 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Matt Parnell <mparnell@...il.com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.27-rc0 Power Bugs with HP/Compaq Laptops

Matt,

On Thu, 7 Aug 2008, Matt Parnell wrote:
> I have had a long ongoing ordeal dealing with the problems associated
> with the HP Pavilion Laptops, mine being a dv9000 series. It seems
> that these either have a broken HPET table, a missing HPET table, or
> some other ACPI issue, as this thing has always had many issues
> regarding ACPI. First, C1E was broken until I totally disabled it with
> a patch, but since .27, that code has been rewritten, and now for some
> reason HPET isn't working anymore, as I have to set the
> clocksource=tsc. On top of that, the tsc clocksource is unstable, and
> with or without dynticks the .27 kernels on my laptop feel slower, and
> laggy, as even KDE slows down whilest using it. Everything works fine
> if I disable the local apic (lapic), but when I do, only one of my CPU
> cores is detected and used, and the CPU frequency scaling doesn't work
> either. No matter what I do with .27, it just won't work.

There is a series of related fixes to C1E/HPET in the bugzilla entry
http://bugzilla.kernel.org/attachment.cgi?id=17622

Patch is available from:  http://bugzilla.kernel.org/show_bug.cgi?id=11418 

Can you please test that on the latest linus git ?

Thanks,

       tglx
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