Bug 201867 – media-libs/libvisual-0.4.0-r1 appears very unstable on 64-bit

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description Eric Bosch 2007-12-10 18:25:19 UTC]

I have been using libvisual/libvisual-plugins as a component for mythmusic and amarok, and recently upgraded my computer to 64-bit (after having motherboard failure).  At any rate, due to the libvisual library which is heavily used by mythmusic, I was having constant segfaults any time I tried to play music.  When I removed the libvisual/libvisual plugins and recompiled mythmusic, the segfaults ceased.  I received a report from the mythtv developers that libvisual is particularly buggy on 64-bit.

Reproducible: Always

Steps to Reproduce:
1.Turn on libvisual use flag, install libvisual/libvisual-plugins and compile mythtv with mythmusic.
2.Try to play music. Mythmusic will segfault about 95% of the time.
3.

Actual Results:  
Mythmusic would work on very few occaisions.  95% of the time it would segfault as soon as it was started.  After removal of the visualizations USE flag, removal of libvisual/plugins libraries and recompile of mythmusic, Mythmusic now works reliably.

Expected Results:  
I obviously lost the visualizations available in mythmusic, however it plays reliable now

The Libvisual/plugins libraries compiled into mythmusic should have provided visualizations for viewing in response to the music playing.  I did not have this issue to this degree while running in a 32-bit system, it really only became a problem on a cleanly built 64-bit system.  This is a Intel 6600 Dual Core 2.6 GHz processor on an Intel motherboard with nVidia 8600GT video card running at 1920x1080 resolution.

[Comment 1 Jakub Moc (RETIRED) 2007-12-10 19:37:29 UTC]

Maybe you could actually post some debugging output and emerge --info.

http://www.gentoo.org/proj/en/qa/backtraces.xml
http://www.gentoo.org/doc/en/bugzilla-howto.xml

[Comment 2 Eric Bosch 2007-12-11 06:07:33 UTC]

It will take me a little bit, as I will set debug flags and reduce optimization flags, and will attach backtrace, etc once I've completed it.  Thanks.

[Comment 3 Eric Bosch 2007-12-11 06:48:54 UTC]

Created attachment 138233 [details]
emerge --info

I have turned debug info on for the main application Mythmusic, libvisual, libvisual-plugins.  This is the emerge --info requested.  Next, I will upload the backtrace. Thanks.

[Comment 4 Eric Bosch 2007-12-11 06:53:37 UTC]

Created attachment 138235 [details]
Backtrace of mythmusic/libvisual crash.

Here's the backtrace of the segfaulting application.  I hope this helps.  BTW, it has worked a few times, but segfaults about 95% of the time.

[Comment 5 Eric Bosch 2007-12-11 06:56:43 UTC]

I am reopening the bug, as I have collected emerge info and backtrace after recompiling libvisual/libvisual-plugins, mythmusic all with debug information.  Thanks.

[Comment 6 Alexis Ballier 2008-01-03 21:12:55 UTC]

hmm could you please tell me what package installs : /usr/lib64/libvisual-0.4/actor/actor_nastyfft.so
?

for ex. "equery belongs /usr/lib64/libvisual-0.4/actor/actor_nastyfft.so"
(get equery from gentoolkit)

[Comment 7 Alexis Ballier 2008-01-03 21:15:40 UTC]

my bad, it seems its in libvisual-plugins as you said... but somehow its not installed here, got to check why...

[Comment 8 Matěj Laitl 2008-01-03 21:19:06 UTC]

kde-devel@nb-esprimo ~ $ equery belongs actor_nastyfft.so
[ Searching for file(s) actor_nastyfft.so in *... ]
media-plugins/libvisual-plugins-0.4.0-r1 (/usr/lib/libvisual-0.4/actor/actor_nastyfft.so)

Moving actor_nastyfft.so fixes the problem and libvisual-plugins work okay.

[Comment 9 Alexis Ballier 2008-01-03 21:27:00 UTC]

(In reply to comment #8)
> kde-devel@nb-esprimo ~ $ equery belongs actor_nastyfft.so
> [ Searching for file(s) actor_nastyfft.so in *... ]
> media-plugins/libvisual-plugins-0.4.0-r1
> (/usr/lib/libvisual-0.4/actor/actor_nastyfft.so)
> 
> Moving actor_nastyfft.so fixes the problem and libvisual-plugins work okay.
> 

well... thanks.
nastyfft plugins has been disabled due to bug #143810
though no ebuild revision bump was done.. so you end up with a potentially bogus libvisual-plugins install. I'll look into it to check if this plugin really has to be disabled and cant be fixed.

syncing your portage tree and reemerging libvisual-plugins again should make nastyfft plugin disappear.

[Comment 10 Matěj Laitl 2008-01-03 21:50:24 UTC]

Works as you said, thanks for quickie fixie.

[Comment 11 Alexis Ballier 2008-01-03 22:48:42 UTC]

nastyfft plugin should be fixed in -r2, thanks for the report !

[Comment 12 Eric Bosch 2008-01-05 07:39:51 UTC]

(In reply to comment #11)
> nastyfft plugin should be fixed in -r2, thanks for the report !
> 
Thank you for taking care of this.  I really appreciate it.