netdev - Re: WARN_ON's in i915_gem

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Date:	Tue, 16 Jun 2009 09:11:05 +0200
From:	Stefan Schmidt <stefan@...enfreihafen.org>
To:	Stefan Schmidt <stefan@...enfreihafen.org>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, tglx@...x.de, alan@...rguk.ukuu.org.uk,
	rjw@...k.pl, netdev@...r.kernel.org, mingo@...e.hu,
	dwmw2@...radead.org, alsa-devel@...a-project.org,
	dri-devel@...ts.sourceforge.net, eric@...olt.net
Subject: Re: WARN_ON's in i915_gem_tiling.c

Hello.

Bringing Eric into the loop here as he is listed as author of the
i915_gem_tiling.c

On Mon, 2009-06-15 at 09:06, Stefan Schmidt wrote:
> 
> On Sun, 2009-06-14 at 17:33, Arjan van de Ven wrote:
> > 
> > Rank 1: i915_gem_set_tiling (warning)
> > 	Reported 830 times (3700 total reports)
> > 	[gem] Failure in the tiling code
> > 	This warning was last seen in version 2.6.30, and first seen in 2.6.29-rc2.
> > 	More info: http://www.kerneloops.org/searchweek.php?search=i915_gem_set_tiling
> 
> There seem to be more then one issue. I'm running into one of them here on a
> Lenovo Thinkpad X200s. It's 2.6.30 and I enabled KMS the first time here. So I
> can't tell if it is a regression.
> 
> http://www.kerneloops.org/oops.php?number=207353

http://www.kerneloops.org/raw.php?rawid=453362&msgid=

and

http://www.kerneloops.org/oops.php?number=453361

Are looking similar to #207353 to me. That's the one I can easily reproduce by
booting into an KMS enabled kernel. Without modsetting eveything is fine. Let me
know if there are patches I should give a try.

> The result is that the EDID data could not be read and the wrong screen size
> set:
> [   45.524589] i2c-adapter i2c-3: unable to read EDID block.
> [   45.588200] i915 0000:00:02.0: DVI-D-2: no EDID data
> [   45.777251] [drm] TMDS-14: set mode 1360x768 13
> [   45.777261] [drm] TMDS-16: set mode 1360x768 13 <= Should be 1280x900 here
> 
> Somehow the driver tries to use DVI1 and DVI2 while the display is connected to
> LVDS1.
> 
> stefan@...alibur:~$ xrandr
> Screen 0: minimum 320 x 200, current 1360 x 800, maximum 8192 x 8192
> VGA1 disconnected (normal left inverted right x axis y axis)
> LVDS1 connected 1280x800+0+0 (normal left inverted right x axis y axis) 261mm x
> 163mm
>    1280x800       60.0*+   50.0  
> DVI1 connected 1360x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
>    1360x768       59.8* 
>    1152x864       60.0  
>    1024x768       60.0  
>    800x600        60.3  
>    640x480        59.9  
> DVI2 connected 1360x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
>    1360x768       59.8* 
>    1152x864       60.0  
>    1024x768       60.0  
>    800x600        60.3  
>    640x480        59.9

regards
Stefan Schmidt
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