linux-kernel - Re: [Intel-gfx] Interrupt latency on some 945GM platforms

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Date:	Tue, 21 Sep 2010 20:26:07 +0200
From:	Paolo Ornati <ornati@...il.com>
To:	Vasily Khoruzhick <anarsoul@...il.com>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Simon Farnsworth <simon.farnsworth@...lan.co.uk>,
	intel-gfx@...ts.freedesktop.org,
	Sitsofe Wheeler <sitsofe@...oo.com>,
	Venkatesh Pallipadi <venki@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [Intel-gfx] Interrupt latency on some 945GM platforms

On Fri, 17 Sep 2010 15:50:43 +0300
Vasily Khoruzhick <anarsoul@...il.com> wrote:

> > Vasily, can you try the qos workaround on your machine and see if it works
> > too?
> > 
> > Thanks,  
> 
> Just give me a patch :)

Me too...

I've a laptop with 945GM (Asus x5dij) and with 2.6.32+ kernels I'm
having random, but not frequent, screen flickering problems (for some
reasons 2.6.31 works fine).

Problem goes away with "nohz=off".

I'll try with "processor.max_cstate=?" and see if that works too.

Bye,

-- 
	Paolo Ornati
	Linux 2.6.35.4 on x86_64
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