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Date: Thu, 15 Oct 2009 00:02:04 -0400
From: Theodore Tso <tytso@mit.edu>
To: Jesse Barnes <jbarnes@virtuousgeek.org>,
       "Carlos R. Mafra" <crmafra2@gmail.com>, Eric Anholt <eric@anholt.net>,
       linux-kernel@vger.kernel.org, Keith Packard <keithp@keithp.com>,
       Chris Wilson <chris@chris-wilson.co.uk>
Subject: Re: 2.6.32 regression (bisected): Video tearing/glitching with
	T400 laptops
Message-ID: <20091015040204.GE8286@mit.edu>
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	Chris Wilson <chris@chris-wilson.co.uk>
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On Wed, Oct 14, 2009 at 10:26:45PM -0400, Theodore Tso wrote:
> 
> If I need to live with a display glitch every 5-10 minutes or so to
> get better power savings, I'll take it....
> 

While mail reading and composing responses in a tty based mail reader
(mutt/emacs -nw), I'm seeing display glitches every 3-5 minutes.  Each
time it's quite minor so it's the sort of thing which is definitely
"blink at the wrong time and you'll miss it".

Being a battery lifetime freak, I'll definitely take the tradeoff, but
given that it occurs even when I'm plugged into AC mains, I could see
some users being annoyed by it, and I could see them wanting to be
able to switch off the feature when they are on AC, if we find a
complete fix.

						- Ted



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