linux-kernel - RE: Possible CPU_IDLE bug [WAS: Re: Timer unstability on when using C2 and deeper sleep states (Dell Latitude XT)]

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Message-ID: <alpine.LFD.1.10.0808141100100.3243@apollo.tec.linutronix.de>
Date:	Thu, 14 Aug 2008 11:00:58 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Milan Plzik <milan.plzik@...il.com>
cc:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: Possible CPU_IDLE bug [WAS: Re: Timer unstability on when using
 C2 and deeper sleep states (Dell Latitude XT)]

On Thu, 14 Aug 2008, Milan Plzik wrote:
>   I tried it just now, is performs a bit better than 2.6.26 (e.g. I
> don't get that "press any key unless nothing happens" states), even
> reports a bit more reasonable values of wakeups, but the system
> sometimes becomes rather slow (e.g. when playing video). I was not able
> to compile fglrx driver, so I had to change it to radeon one. And also,
> the number of wakeups reported is not very convincing, though, it
> changes from 300 to 600 (which is ~ two times the sum of wakeups)
> without any reason, and sometimes goes even higher.
> 
>   I tried to use nolapic_timer option, but it didn't help.

Can you please try "hpet=disable" on the kernel command line ?

Thanks,
	tglx
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