Message-ID: <AANLkTikf+8_bqDkiqeS_TWqMK0WLZqKazxjnZBDES=zR@mail.gmail.com>
Date:	Tue, 24 Aug 2010 01:09:56 -0400
From:	Alex Deucher <alexdeucher@...il.com>
To:	trapdoor6@...il.com
Cc:	airlied@...ux.ie, "Rafael J. Wysocki" <rjw@...k.pl>,
	LKML <linux-kernel@...r.kernel.org>,
	trapDoor <trapdoor6@...glemail.com>
Subject: Re: [REGRESSION, Radeon-KMS] 2.6.36-rc1 - graphic issues in 0. A.D.

On Mon, Aug 23, 2010 at 12:00 PM, trapDoor <trapdoor6@...il.com> wrote:
> On Mon, Aug 23, 2010 at 6:12 AM, Alex Deucher <alexdeucher@...il.com> wrote:
>> On Sun, Aug 22, 2010 at 3:41 PM, trapDoor <trapdoor6@...il.com> wrote:
>>> Hello,
>>> Just wanted to let you know about this before bisecting which
>>> hopefully I will be able to start tomorrow. Please take a look at the
>>> screenshots in below links to see the difference with rendering
>>> textures in 0 A.D. alpha1 on kernel 2.6.35.3 and 2.6.36-rc1-git3. [0
>>> A.D. - strategic game, OS clone of Age of Empires; home page:
>>> http://wildfiregames.com/0ad/]
>>>
>>> 0 A.D. on kernel 2.6.35.3 [good]:
>>> http://picasaweb.google.co.uk/104351852606666221362/0ad?authkey=Gv1sRgCMne0NqXpuzR_gE#5508312214769142226
>>>
>>> 0 A.D. on kernel 2.6.36-rc1-git3:
>>> http://picasaweb.google.co.uk/104351852606666221362/0ad?authkey=Gv1sRgCMne0NqXpuzR_gE#5508312218519295058
>>>
>>> Please note that in both cases only kernel was different. The other
>>> components [including hardware] were in the same versions and had the
>>> same options (like the game itself, xorg-ati drivers, mesa, libdrm
>>> [S3TC disabled], etc.). So it must be kernel then.
>>
>> What card?  Anything in your dmesg?
>>
>> Alex
>>
>
> Hi Alex,
> Sorry for lack of details in my first e-mail. I was hoping to send you
> the logs together with bisecting results. Unfortunately there are
> other issues between 2.6.35-git2 - the last 'good' kernel (which
> doesn't include the first drm pull for 2.6.36 window merge) - and
> 2.6.36-rc1. Due to those issues I can't bisect.
>
> For example:
> 1) First I tried to narrow the problem down to the closest affected
> kernel snapshot. So I marked 2.6.35-git2 as good and I was expecting
> that 2.6.35-git3 will be a bad one (as -git3 is the first snapshot
> that includes drm patches from the first drm pull). But on -git3 0
> A.D. even fails to start.
>
> 2) Then I was hoping to do bisecting between 2.6.35-git11 and
> 2.6.35-git12 (-git12 is the first snapshot that includes patches from
> the second drm pull). But these both snapshots won't even compile for
> me. It stops suddenly at the second stage of making modules without
> giving any errors (despite kernel debugging enabled in .config). I
> remember I had this problem for a while, AFAIR since around
> 2.6.35-git5 to -git15 - between these I couldn't compile any snapshot
> I had tried.
>
> It's very likely that the issue I wanted to bisect is related to one
> of or both drm pulls . So doing bisect between e.g. these kernels:
> 2.6.35-git16 (which includes both drm pulls; assuming it's the first
> snapshot since -git5 I could compile) and 2.6.36-rc1 would be
> pointless - they both will be bad.
>
>
> ------------
> Now, this is my card:
>
> Asus ATI Radeon HD3650 Silent 512MB
> some glxinfo details:
>        OpenGL vendor string: Advanced Micro Devices, Inc.
>        OpenGL renderer string: Mesa DRI R600 (RV635 9598) 20090101  TCL DRI2
>        OpenGL version string: 2.1 Mesa 7.9-devel
>        OpenGL shading language version string: 1.20
>
>
> ------------
> About the logs. It happens that 0 A.D. does produce really huge logs.
> Running the game just for about 10 SECONDS (counting after chosen map
> has been loaded) relulted in these:
>
> On a 'good' kernel 2.6.35.3
>        60K     ./Xorg.0.log
>        48K     ./dmesg
>        27M     ./kern.log
>        27M     ./syslog
>        27M     ./messages
>        81M     [total]
>
> on a bad kernel 2.6.36-rc1
>        60K     ./Xorg.0.log
>        52K     ./dmesg
>        21M     ./kern.log
>        21M     ./syslog
>        21M     ./messages
>        63M     [total]
>
> There's no mistake above: 3 logs had been blown up to over 20M during
> only the little time when the game was running.
> How I did it: deleted all those logs completely, re-booted from the
> 'good' kernel, run the game and stopped. Then archived the logs,
> deleted again and repeated the same on the 'bad' kernel.
>
> So it looks like 99,999% of all lines in: kern.log, messages in syslog
> were produced on both kernels when 0 A.D. was running. Before I first
> time run it, I had never seen kern.log and messages in /var/log at
> all, and syslog was never bigger than around 1,5M (with logs collected
> from several boots and during a couple of days). Running 0 A.D. for a
> couple of minutes results in about 1G for each of those 3 logs.
>
> After compressing, the archive files are relatively small:
>        2.0M    ./2.6.35.3_0ad-logs.tar.bz2
>        680K    ./2.6.35.3_0ad-logs.tar.lzma
>
>        1.6M    ./2.6.36-rc1-00159-g36423a5_0ad-logs.tar.bz2
>        748K    ./2.6.36-rc1-00159-g36423a5_0ad-logs.tar.lzma [yes, somehow this
> came up bigger than 2.6.35.3(...).lzma]
>
>
> Do you mind if I send the .lzma's to you (unless you prefer .bz2)? I
> won't cc LKML or anyone of course, they will be sent only to you.
> Please let me know.

I don't really need the whole files, likely it's just a few messages
repeated.  Go ahead and send me the files and I'll take a look.

Alex
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