2016-03-23 20:13 GMT+01:00 Tim E. Real <[email protected]>:
> Did some digging.
> Verified it's caused by loading Qt4 plugins into Qt5 MusE.
>
> I found this great thread confirming everything that I found:
> https://linuxmusicians.com/viewtopic.php?f=24&t=14965&p=69932#p69932
Awesome. Sounds like a good plan with a work around like that too. Really
disturbing that it bugs out in that way though. I guess that having synthv1
compiled with Qt5 would solve it too. Though possibly there are other
synths around which are not so easy to recompile.
/Robert
>
> Here's my response to the thread:
>
> ========================
> Hi!
> I just found this thread - after completely verifying everything said here
> the hard way.
>
> Yesterday I set out to find out why stock synthv1 + friends were crashing
> MusE
> here on KUbuntu 15.10.
>
> I suspected it was library symbol conflicts but had thought is was OUR
> symbols.
> When we added namespaces to MusE that seemed to cure some problems.
> No luck using them in this situation here though. I tried.
>
> Eventually I reasoned it was Qt conflicts, and whittled it down to a simple
> Qt5 Creator application:
> dlopen(path-to-synthv1, RTLD_NOW);
>
> Crash. That sucks.
> Funny, as soon as I suspected it was a Qt problem, I had very uneasy
> feelings
> about the whole thing.
>
> So... I may have a solution here :)
> In our LV2 code, I hacked lilv_lib_open() and added the RTLD_DEEPBIND.
>
> Success!
>
> I am at this moment playing synthv1. Nice sound from the start. Old school.
>
> However, attempting to open the GUI crashes, of course :(
> But I can still use the MusE generic GUI instead :D
>
> Anyway at least now I can poke around the library + ttls and determine if
> the
> native-GUI open menu item should be greyed out.
>
> I will commit something if this works OK. Stay tuned.
>
> If you guys think this is a bad idea, like if you think some synths might
> still crash upon load, let me know what you think.
>
> Thank you very much to all for the concise information I was looking for
> here.
> It's eye-opening for sure.
>
> ========================
>
>
> Tim.
>
>
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