Re: [LAU] Glitch 2

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To: <linux-audio-user@...>, taktik <taktik@...>
Date: Monday, April 15, 2013 - 6:42 pm

On April 15, 2013 07:06:39 PM taktik wrote:

No problem, glad to help.
Still fairly fresh paint on the support in MusE, so we're learning too.

>

Actually I did call it - but only once after opening the GUI, which turns out
to be inadequate here.

> So if qtractor and muse could be patched to call

So as I mention in my reply here and to the company, this is what I did:
We have a handy slow-rate QTimer slot in our synth classes, for GUI updates.
So I simply call effEditIdle from it. By default the timer is about
20 times per second, and is user-adjustable.
I'll try to get that patch in soon...

> > it crashes during shutdown

Definitely some commonality here !

Without actually instantiating - just simple plugin discovery -
I get this *identical* crash at host shutdown with these plugins:

Glitch-2.0, DiscoveryDemo, HighLife-1.1, Tonespace

===================================================
*** glibc detected *** ./muse2: double free or corruption (out): 0x08824c88
***
======= Backtrace: =========
/lib/i386-linux-gnu/libc.so.6(+0x75ee2)[0x5646ee2]
/usr/lib/i386-linux-gnu/libX11.so.6(+0x2431e)[0x485031e]
/usr/lib/i386-linux-gnu/libX11.so.6(XrmDestroyDatabase+0x7d)[0x486bdfd]
/usr/lib/i386-linux-gnu/libX11.so.6(_XFreeDisplayStructure+0x44b)[0x485256b]
/usr/lib/i386-linux-gnu/libX11.so.6(XCloseDisplay+0xd9)[0x483f039]
/usr/lib/i386-linux-gnu/libQtGui.so.4(+0x1c5c17)[0x109ac17]
/usr/lib/i386-linux-gnu/libQtGui.so.4(_ZN12QApplicationD1Ev+0x44c)[0x101aa9c]
./muse2(_ZN15MuseApplicationD2Ev+0x2b)[0x8050e7f]
./muse2(main+0x2402)[0x80503db]
/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x55ea4d3]
./muse2[0x804d5d1]
===================================================

These plugins do not cause the crash, even when they are all loaded:

AspectVST, BitMangler, Equinox, my_synth4, String_VST, String_FXVST,
TAL-Dub-3, TAL-Reverb-3, TAL-Vocoder-2, VEX, ZR3.

Rui, if you are reading this, you mention this mysterious crash in your
QTractor code, to avoid the problem you let Qt implicitly unload the
plugins rather than explicitly unloading them.
But, I had no luck trying the same thing here for MusE.
You mention that these crashes may be related to JUCE-based plugins.

I would really like to solve this mysterious common problem.

Using Lubuntu 12.04 here:
Linux my-desktop 3.2.0-30-generic #48-Ubuntu SMP Fri Aug 24 16:54:40 UTC 2012
i686 athlon i386 GNU/Linux

Thanks.
Tim.

>

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Messages in current thread:
[LAU] Glitch 2, Dave Phillips, (Wed Apr 10, 11:37 am)
Re: [LAU] Glitch 2, Paul Davis, (Wed Apr 10, 12:04 pm)
Re: [LAU] Glitch 2, Paul Davis, (Wed Apr 10, 12:42 pm)
Re: [LAU] Glitch 2, Tim E. Real, (Thu Apr 11, 12:05 am)
Re: [LAU] Glitch 2, Atte, (Fri Apr 12, 6:42 am)
Re: [LAU] Glitch 2, Tim E. Real, (Fri Apr 12, 11:52 pm)
Re: [LAU] Glitch 2, Paul Davis, (Sat Apr 13, 12:15 am)
Re: [LAU] Glitch 2, Dan MacDonald, (Sat Apr 13, 7:34 am)
Re: [LAU] Glitch 2, taktik, (Mon Apr 15, 5:07 pm)
Re: [LAU] Glitch 2, Tim E. Real, (Mon Apr 15, 6:42 pm)
Re: [LAU] Glitch 2, taktik, (Thu Apr 18, 4:24 pm)
Re: [LAU] Glitch 2, Rui Nuno Capela, (Mon Apr 15, 5:42 pm)
Re: [LAU] Glitch 2, taktik, (Mon Apr 15, 6:00 pm)
Re: [LAU] Glitch 2, Louigi Verona, (Mon Apr 15, 6:03 pm)
Re: [LAU] Glitch 2, Paul Davis, (Mon Apr 15, 6:05 pm)
Re: [LAU] Glitch 2, Paul Davis, (Mon Apr 15, 5:16 pm)
Re: [LAU] Glitch 2, Johannes Kroll, (Fri Apr 12, 10:28 am)
Re: [LAU] Glitch 2, Atte, (Fri Apr 12, 12:59 pm)
Re: [LAU] Glitch 2, Kieran Foster, (Fri Apr 12, 1:16 pm)
Re: [LAU] Glitch 2, rosea.grammostola, (Fri Apr 12, 1:45 pm)
Re: [LAU] Glitch 2, Louigi Verona, (Fri Apr 12, 7:00 am)
Re: [LAU] Glitch 2, Atte, (Fri Apr 12, 7:11 am)
Re: [LAU] Glitch 2, hermann meyer, (Fri Apr 12, 8:58 am)
Re: [LAU] Glitch 2, Atte, (Fri Apr 12, 10:02 am)
Re: [LAU] Glitch 2, hermann meyer, (Fri Apr 12, 10:30 am)
Re: [LAU] Glitch 2, Louigi Verona, (Fri Apr 12, 10:32 am)
Re: [LAU] Glitch 2, hermann meyer, (Fri Apr 12, 11:02 am)
Re: [LAU] Glitch 2, Louigi Verona, (Wed Apr 10, 12:54 pm)
Re: [LAU] Glitch 2, Rui Nuno Capela, (Wed Apr 10, 4:34 pm)
Re: [LAU] Glitch 2, Rui Nuno Capela, (Thu Apr 11, 6:21 pm)
Re: [LAU] Glitch 2, Joe Hartley, (Thu Apr 11, 6:24 pm)
Re: [LAU] Glitch 2, Johannes Kroll, (Wed Apr 10, 4:54 pm)
Re: [LAU] Glitch 2, Louigi Verona, (Wed Apr 10, 11:40 am)