From: Martin Steigerwald <Martin@lichtvoll.de>
To: LKML <linux-kernel@vger.kernel.org>
Subject: [regression] 2.6.37-post-rc7 with radeon kms: reproducably locks up hard when using desktop cube of kwin
Date: Sat, 5 Mar 2011 15:10:24 +0100
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I will add a regression entry in bugzilla after I got the URL of that=20
mail.


Hi!

No, I do not actively search for lockup bugs, but they seem to search me=20
;).


martin@shambhala:~> cat /proc/version
Linux version 2.6.38-rc7-tp42-00142-g212e349 (martin@shambhala) (gcc=20
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=20
effect with Ctrl-F11. Otherwise the machine seems to work fine so far - if=
=20
that continues I do not have much of a problem with the bug since I do not=
=20
use desktop cube other than for getting a feel of compositing performance.=
=20
Effects seem to be more fluent, more smooth anyway, I guess due to Radeon=20
KMS page flipping.

I am using X.org 1.9.4 with Radeon driver 1:6.14.0-1 on Debian=20
Wheezy/Sid/Experimental on a ThinkPad T42 with:

martin@shambhala:~> lspci -nn | grep VGA
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV350=20
[Mobility Radeon 9600 M10] [1002:4e50]

This didn't happen with 2.6.37-tp42-rtime-00004-g9eb63ce, same gcc.

Possibly related to bug #28622 "radeon video lookup".


As I am in my holidays in Sevilla I will only care about bisecting when it=
=20
rains three days in a row ;) - cause I insist on my holidays being=20
holidays and so will only do light kernel testing ;). I wanted to report=20
this nonetheless since at least on my machine this is really easy to=20
reproduce.=20

Ciao,
=2D-=20
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7

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