From: Andy Lutomirski <luto@MIT.EDU>
To: Patrik Kullman <patrik.kullman@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: i915: RC6 causes sudden shutdowns
Date: Thu, 01 Dec 2011 14:45:51 -0800 [thread overview]
Message-ID: <4ED8039F.4090104@mit.edu> (raw)
In-Reply-To: <CAGPN=9Q8gB_xsbB1BrMJSo_Qs=7Tu49RX4x3VqNB9adzVdm6kg@mail.gmail.com>
On 11/23/2011 03:43 PM, Patrik Kullman wrote:
> Hi,
>
> I recently acquired the Asus Zenbook UX31E but have been looking for
> ways to extend the battery life.
>
> I read that the i915_enable_rc6 parameter could decrease power usage
> significantly and tried it with the 3.1.1 and 3.1.2 kernels, and
> indeed it does.
> However, I (and the other Zenbook-owners from the Ubuntu forums)
> experience sudden, unexpected shutdowns (for me, 1-4 times per day)
> with this parameter.
> It's as sudden as a power loss.
Do you have DMAR enabled? If so, it's a known problem and it's being
worked on (and the default will not change for you AFAICT). If not, you
should send a bug report to the intel-gfx -- several people there care
about this.
--Andy
next prev parent reply other threads:[~2011-12-01 22:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-23 23:43 i915: RC6 causes sudden shutdowns Patrik Kullman
2011-11-30 21:39 ` Patrik Kullman
2011-12-01 22:45 ` Andy Lutomirski [this message]
2011-12-02 5:00 ` Patrik Kullman
2011-12-02 18:34 ` Andrew Lutomirski
2011-12-03 8:19 ` Patrik Kullman
2011-12-03 15:20 ` Patrik Kullman
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