linux-kernel - Re: Bug Report for Linux Kernel 3.x

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Date:	Wed, 24 Aug 2011 21:25:43 +0800
From:	Jeff Chua <jeff.chua.linux@...il.com>
To:	Steevven1 <steevven1@...il.com>
Cc:	Dave Jones <davej@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: Bug Report for Linux Kernel 3.x

Your might have  a different issue or perhaps you should make sure
you're up to date with the latest git pull. I'm on
14c62e78dc1379185515be41903c4a667efc6d54 (3.1.0-rc3)

I'm using Lenovo X201s and X was very very unstable and screen freezes
after a while. Now after adding i915.i915_enable_rc6=1, X is running
happily again!!!

Thanks,
Jeff.


On Wed, Aug 24, 2011 at 12:00 PM, Steevven1 <steevven1@...il.com> wrote:
>
> Thanks for the comment. I have already tried this with several
> different 3-series kernels. There was no effect on power consumption
> or output from powertop.
>
> SK!
>
>
> On Tue, Aug 23, 2011 at 11:58 PM, Dave Jones <davej@...hat.com> wrote:
> > On Tue, Aug 23, 2011 at 07:19:35PM -0400, Steevven1 wrote:
> >  > Hello,
> >  >
> >  > I would like to report what myself and several others believe to be a
> >  > serious bug affecting all Linux kernels 3.0 and up, and none below 3.0
> >  > (2.6.x and lower).
> >  >
> >  > One-sentence description: On certain hardware, the 3.x series kernels
> >  > drain a considerable amount more power than the 2.6-series kernels, up
> >  > to 40% more, even when idle.
> >  >
> >  > The specific hardware I have personally tested is a Lenovo ThinkPad
> >  > X220 with an Intel SandyBridge i7 2620M processor.
> >
> > Sounds like https://bugzilla.redhat.com/show_bug.cgi?id=727579
> > Try booting with i915.i915_enable_rc6=1
> >
> >        Dave
> >
> >
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