On Sunday, May 1, 2016 2:05:20 AM EDT Tim E. Real wrote:
> Can you check if for example LV2 Calf, say Calf Organ's
> UI can be opened or crashes?
>
> I'm getting a crash at line 1402 in lv2host.cpp:
>
> LV2Synth::lv2ui_ShowNativeGui (...)
> {
> ...
> HERE: ewWin = QWidget::createWindowContainer(x11QtWindow);
> ...
> }
>
> I recompiled our lv2GtkHelper library but same thing.
>
> I built Calf from source and verified that MusE was opening
> my installed Calf version in /usr/local but same thing.
>
> I had suspected it was similar to the Qt4 / Qt5 difference thingy
> which causes synthv1(qt4) and friends' UIs to crash upon dlopen(),
> where the plugin was built with Qt4 and your system is running Qt5,
> except here it would be caused by a Gtk-2 / Gtk-3 difference.
> But no, it does not seem to be the same type of issue here,
> it is not crashing at dlopen().
>
> The code seems to be the correct way from what I have researched.
> I tried passing a parent to createWindowContainer(),
> and passing some flags as I saw suggested.
>
> Calf was definitely working before I distro upgraded.
>
> I will try to fire up the old distro but thought I would ask here.
>
> Thanks.
> Tim.
Thanks for the replies.
That's what I get for upgrading to cutting edge instead of LTS, eh ;-)
It's Kubuntu 16.
Tried some more things. Created my own parent and passed it
to createWindowContainer(). NG.
At this moment here's where I'm at:
I thought I read about some troubles with QWindow initial sizes and so on.
The geometry of variable x11QtWindow is zero at first.
I give it some geometry so that I might see something, with:
x11QtWindow->setGeometry(100, 100, 200, 200);
Just to be sure, I also do:
x11QtWindow->show();
* Only by removing the line that I mentioned:
ewWin = QWidget::createWindowContainer(x11QtWindow);
(and removing this one too, of course)
win->setCentralWidget(ewWin);
do I get somewhere.
Presto !
Calf UI up and running fine and showing at the geometry above.
The container parent (variable 'win') is also showing,
but is blank of course since I rem'd createWindowContainer().
Oddly, I can expand the Calf window /outward/ but not inward.
I guess it'll allow inward once I go /past/ Calf's desired minimum size,
which I didn't bother trying.
Hm. You know, it crashes on an actual x11 xCB_something_or_other
call to setParent(). (That's why I was trying parent stuff.)
I recently swapped my video card due to severe instability with KDE
and now everything seemed fine. Or not ...
These cards are a wee bit old eh... Out of the five or so I have
all of them are really touch and go with modern KDE - this one was
the only one that gave solid stability for a week now.
Stay tuned...
Tim.
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