Re: commit drm/i915: disable shared panel fitter for pipe breaks resolution switching

From: Hans de Bruin <jmdebruin@xmsnet.nl>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
	intel-gfx <intel-gfx@lists.freedesktop.org>
Subject: Re: commit drm/i915: disable shared panel fitter for pipe breaks resolution switching
Date: Mon, 08 Apr 2013 19:38:29 +0200	[thread overview]
Message-ID: <51630095.8010206@xmsnet.nl> (raw)
In-Reply-To: <20130407185651.GI2228@phenom.ffwll.local>

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On 04/07/2013 08:56 PM, Daniel Vetter wrote:
> On Sun, Mar 10, 2013 at 06:02:32PM +0100, Hans de Bruin wrote:
>> On 03/06/2013 11:37 PM, Daniel Vetter wrote:
>>> On Wed, Mar 6, 2013 at 7:39 PM, Hans de Bruin <jmdebruin@xmsnet.nl> wrote:
>>>> On 03/06/2013 03:00 PM, Daniel Vetter wrote:
>>>>>
>>>>> Hi Hans,
>>>>>
>>>>> Can you please test with 3.9-rc1? That contains an additional patch
>>>>> which might prevent the regression. Specifically
>>>>>
>>>>> commit 9d6d9f19e8146fa24903cb561e204a22232740e3
>>>>> Author: Mika Kuoppala <mika.kuoppala@linux.intel.com>
>>>>> Date:   Fri Feb 8 16:35:38 2013 +0200
>>>>>
>>>>>       drm/i915: clean up panel fitter handling in lvds
>>>>
>>>>
>>>> Today's kernel still contains the bug.
>>>
>>> Hm, I've just retested latest drm-intel-nightly which should have the
>>> same set of relevant patches, and I couldn't reproduce your issue.
>>> Low-res modes on the lvds panel seem to correctly scale up here on my
>>> 945gm.
>>>
>>> Can you pls retest with latest -nightly from
>>> http://cgit.freedesktop.org/~danvet/drm-intel ?
>>>
>>> Also please attach the output of xrandr --verbose when running with a
>>> reduced mode.
>>>
>>
>> tested:
>> http://cgit.freedesktop.org/~danvet/drm-intel
>> commit d08a6eb2690b1ac6f0582feb41c2ccbea945285f
>> Date:   Thu Mar 7 22:54:25 2013 +0100
>>
>> The problem is still there
>>
>>
>> my previous post contained  the  xrandr output whiteout the verbose.
>> Doe you want my to repost with the verbose option?
>
> Sorry for the long delay in taking again a look at this. I've tried to
> reproduce this on my various machines similar to yours, but totally
> failed. Also, a bunch of people with matching machines to yours actually
> claim that the 2 commits which regress for you actually fix up lvds panel
> fiting for them. So I'm a bit lost as to what's going on here.
>
> Can you please try the below debug patch on top of latest 3.9-rc kernels?
>
> Please boot that kernel with drm.debug=0xe added to your kernel cmdline,
> reproduce the issue (preferrably with xrandr --output LVDS --mode ...) and
> then attach the complete dmesg. This will enable lots of debugging, so
> please make sure you grab everything starting from when i915.ko loads.
>

ok, here is de dmesg.

-- 
Hans

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