linux-kernel - Re: [regression] 2.6.37-post-rc7 with radeon kms: reproducably locks up hard when using desktop cube of kwin

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Date:	Sun, 6 Mar 2011 19:29:13 +0100
From:	Martin Steigerwald <Martin@...htvoll.de>
To:	Alex Deucher <alexdeucher@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	DRI <dri-devel@...ts.freedesktop.org>
Subject: Re: [regression] 2.6.37-post-rc7 with radeon kms: reproducably locks up hard when using desktop cube of kwin

Am Sunday 06 March 2011 schrieb Alex Deucher:
> On Sat, Mar 5, 2011 at 9:10 AM, Martin Steigerwald <Martin@...htvoll.de> 
wrote:
> > I will add a regression entry in bugzilla after I got the URL of that
> > mail.
> > 
> > 
> > Hi!
> > 
> > No, I do not actively search for lockup bugs, but they seem to search
> > me ;).
> > 
> > 
> > martin@...mbhala:~> cat /proc/version
> > Linux version 2.6.38-rc7-tp42-00142-g212e349 (martin@...mbhala) (gcc
> > version 4.4.5 (Debian 4.4.5-11) ) #4 PREEMPT Sat Mar 5 12:03:41 CET
> > 2011
> > 
> > locks up hard when using desktop cube of kwin from KDE 4.5.1.
> > 
> > It happens within a few seconds to about 30 seconds after activating
> > the effect with Ctrl-F11. Otherwise the machine seems to work fine
> > so far - if that continues I do not have much of a problem with the
> > bug since I do not use desktop cube other than for getting a feel of
> > compositing performance. Effects seem to be more fluent, more smooth
> > anyway, I guess due to Radeon KMS page flipping.
> > 
> > I am using X.org 1.9.4 with Radeon driver 1:6.14.0-1 on Debian
> > Wheezy/Sid/Experimental on a ThinkPad T42 with:
> > 
> > martin@...mbhala:~> lspci -nn | grep VGA
> > 01:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV350
> > [Mobility Radeon 9600 M10] [1002:4e50]
> > 
> > This didn't happen with 2.6.37-tp42-rtime-00004-g9eb63ce, same gcc.
> 
> Did you also update your ddx or mesa during this period?  It might
> also be a issue in the userspace acceleration drivers.  Are you using
> the r300 classic or r300 gallium 3D driver?

Debian maintainers activated the gallium one in the meantime:

martin@...mbhala:~> glxinfo | grep OpenGL
OpenGL vendor string: X.Org R300 Project
OpenGL renderer string: Gallium 0.4 on ATI RV350
OpenGL version string: 2.1 Mesa 7.10
OpenGL shading language version string: 1.20
OpenGL extensions:

I think I tried the desktop cube with the gallium one already, but I am 
not absolutely sure.

I have a 2.6.37 kernel still at hand and will test with just changing the 
kernel.

Thanks,
-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7

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