linux-kernel - RE: 2.6.29 git master and PAT problems

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Date:	Mon, 6 Apr 2009 11:40:40 -0700
From:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
To:	Alessandro Suardi <alessandro.suardi@...il.com>
CC:	Arkadiusz Miskiewicz <a.miskiewicz@...il.com>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: RE: 2.6.29 git master and PAT problems

 

>-----Original Message-----
>From: Alessandro Suardi [mailto:alessandro.suardi@...il.com] 
>Sent: Monday, April 06, 2009 8:37 AM
>To: Pallipadi, Venkatesh
>Cc: Arkadiusz Miskiewicz; Siddha, Suresh B; 
>linux-kernel@...r.kernel.org; Jesse Barnes
>Subject: Re: 2.6.29 git master and PAT problems
>
>On Fri, Apr 3, 2009 at 3:59 PM, Pallipadi, Venkatesh
><venkatesh.pallipadi@...el.com> wrote:
>>
>> The patch here should get rid of the below msgs.
>> http://marc.info/?l=linux-kernel&m=123862741914199&w=2
>>
>> Can you please test and check whether that resolves the problems?
>>
>> The patch inline in this mail above was a test patch to debug the
>> another problem that only happens with recent X and that one we
>> are still debugging. So you can ignore the above patch for now.
>>
>>
>> Thanks,
>> Venki
>
>Thanks Venki - the messages are gone, but I appear to be far from
> having my graphical environment problems fixed...
>
>- I still get
>
>Apr  6 11:59:39 localhost kernel: [drm] Initialized drm 1.1.0 20060810
>Apr  6 11:59:39 localhost kernel: pci 0000:00:02.0: PCI INT A -> GSI
>16 (level, low) -> IRQ 16
>Apr  6 11:59:39 localhost kernel: mtrr: type mismatch for
>e0000000,10000000 old: write-back new: write-combining
>Apr  6 11:59:39 localhost kernel: [drm] MTRR allocation failed.
>Graphics performance may suffer.
>Apr  6 11:59:39 localhost kernel: [drm] Initialized i915 1.6.0
>20080730 for 0000:00:02.0 on minor 0
>Apr  6 11:59:39 localhost kernel: mtrr: type mismatch for
>e0000000,10000000 old: write-back new: write-combining
>
>- I can't switch from X to VT (Alt-Fn) as my screen gets blank, no
> Caps Lock key led flashing when I hit the key, nothing else than a
> poweroff works
>
>- I can't exit from X to VT as my screen gets flashing and scrolls
> what appears to be a prompt on the top of the screen instead of
> the bottom
>
>F10 kernels behave the same way. 2.6.29.1 as well. Will test
> 2.6.28 or earlier and report in a separate thread with full
> config details.
>

Also test with and without CONFIG_DRM_* for your graphics card.

MTRR messages looks like are due to the conflict between BIOS MTRR
setting and what X is trying to set. Booting into run level 3 and
output of cat /proc/mtrr would be useful data as well.

Thanks,
Venki--
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