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

[Alex Deucher]

On Sat, Mar 5, 2011 at 9:10 AM, Martin Steigerwald <Martin at lichtvoll.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 at shambhala:~> cat /proc/version
> Linux version 2.6.38-rc7-tp42-00142-g212e349 (martin at shambhala) (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 at shambhala:~> 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?

Alex

>
> Possibly related to bug #28622 "radeon video lookup".
>
>
> As I am in my holidays in Sevilla I will only care about bisecting when it
> rains three days in a row ;) - cause I insist on my holidays being
> holidays and so will only do light kernel testing ;). I wanted to report
> this nonetheless since at least on my machine this is really easy to
> reproduce.
>
> Ciao,
> --
> Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
> GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7
>
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