linux-kernel - Re: X freezes intermittently with 2.6.29.1

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Date:	Thu, 16 Apr 2009 00:18:06 -0700
From:	Yinghai Lu <yhlu.kernel@...il.com>
To:	davidjon@...ontk.org
Cc:	linux-kernel@...r.kernel.org, venkatesh.pallipadi@...el.com,
	Ingo Molnar <mingo@...e.hu>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: Re: X freezes intermittently with 2.6.29.1

On Thu, Apr 16, 2009 at 12:06 AM, David John <davidjon@...ontk.org> wrote:
> Hi All,
>
> With 2.6.29.1 (stock kernel), on my Dell Inspiron 1545, X freezes for
> 15-20 seconds at a time randomly every 10 seconds or so making it
> unusable. Currently, I use the 2.6.29.1-54.fc11.x86_64 kernel that comes
> with Fedora 11 Beta which has the same problem but only when X is left
> idle for a period of time. The kernel log is overrun by messages of the
> type:
>
> X:2802 freeing invalid memtype e4b42000-e4b43000
> X:2802 freeing invalid memtype e4b43000-e4b44000
> X:2802 freeing invalid memtype e4b44000-e4b45000

can you try tip?
http://people.redhat.com/mingo/tip.git/readme.txt

it seems include one patch for that.

>
> This I believe is related to this:
>
> mtrr: type mismatch for e0000000,10000000 old: write-back new:
> write-combining
> [drm] MTRR allocation failed.  Graphics performance may suffer.
>
> The MTRR setup is below:
> reg00: base=0x000000000 (    0MB), size=32768MB, count=1: write-back
> reg01: base=0x0e0000000 ( 3584MB), size=  512MB, count=1: uncachable
> reg02: base=0x07dc00000 ( 2012MB), size=    4MB, count=1: uncachable
> reg03: base=0x07e000000 ( 2016MB), size=   32MB, count=1: uncachable
>
> I think the first entry is bogus. Both kernels come with the
> MTRR sanitize option enabled but the code is unable to find an
> optimal value. Is there any way to correct this? What values for
> mtrr_gran_size and mtrr_chunk_size would be appropriate?

gran_size: 32M 	chunk_size: 128M 	num_reg: 7  	lose cover RAM: 28M

YH
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