I cannot get Qt Creator / Designer to work for the life of me

[JonB]

@Mlibu That does not address running it (Creator executable) under gdb in case you get a clue from the crash stack trace....

[Mlibu]

@JonB So does that mean that the lack of a GPU is not the problem?

I ran under gdb and after the threads start up I get "Found an unknown QML value." followed by "Trying to construct an instance of an invalid type, type id: -1".

Then there is a line "Detaching after vfork from child process 11111". After that line there is a bunch of:

qtc.imagecontainer.debug: void QmlDesigner::readSharedMemory(qint32, QmlDesigner::ImageContainer&) Not able to create image: 0 0 0.

Then more of the first error, then more of the second, then Thread 1 'qtcreator' received signal SIGSEGV, Segmentation fault.

And that's it. Any ideas?

[Mlibu]

@Mlibu PS. glxdiag says direct rendering and glxgears runs so I guess I supposrt opengl.

[JonB]

@Mlibu said in I cannot get Qt Creator / Designer to work for the life of me:

then Thread 1 'qtcreator' received signal SIGSEGV, Segmentation fault.

So you are supposed to (at least try to) view the stack trace. bt is the gdb command. See if there is any clue there.

[Mlibu]

@JonB
Yes I did. I thought you meant stack trace and bt was what I did. I closed it by accident without saving the trace and I have been trying to do it again.

However, I have been having other strange things happen when I install QtCreator. There is an 'impoort <projectname>' in the Screen01.ui.qml with a line error: QML Module contains C++ plugin, currently reading type information. I cannot build with that there and have to remove it before I can build. Also when I first go to the designer page the UI does not get drawn properly and it seems hung somehow. There is only a checkered item in the screen even though I had created the new Qt project. Then later the proper UI seems to come back. But then it only lasts for a couple minutes and dies. And I delete the project directories before I try again. I tried CMake, build, clean project, etc etc.

I only found this comment on SO which doesn't give very many details on how to resolve it, unfortunately. It just talks about resetting the code model and explicitly importing the qrc path.

This time Qt Creator just froze in the designer screen instead if crashing. Also I noticed that KDE Plasma 5 requires qtdesigner from qt5-tools. Could this be confusing anything?

Here is the top of my stack:
#0 0x00007ffff52daed0 in QV4::Compiler::Codegen::visit(QQmlJS::AST::UiProgram*) () from /home/user/Qt/Tools/QtCreator/bin/../lib/qtcreator/../Qt/lib/libQt6Qml.so.6
#1 0x000000000ca811a0 in ?? ()
#2 0x00007fffa3b45538 in ?? ()
#3 0x00007fffffffbec0 in ?? ()
#4 0x00007fffa808d6c0 in ?? ()
#5 0x00007ffff56132a9 in QV4::QQmlTypeWrapper::virtualResolveLookupGetter(QV4::Object const*, QV4::ExecutionEngine*, QV4::Lookup*) ()

Maybe when I install my next system I'll hold my nose and install Manjaro Gnome and see if that works.

[Tink]

@Mlibu have you tried to disable plugins (help about-plugins)?

[andr]

@Mlibu: Not a full answer, anyways: qtdesigner from qt5-tools is the Qt Widgets Designer and does not interfere in any way with the QML that you are using here.

[aha_1980]

Hi @Mlibu,

IIRC, the QML stuff needs 3D accelleration. Could you try to start Creator without these plugins to see if that makes a difference?

/opt/Qt/Tools/QtCreator/bin/qtcreator -noload QmlDesignerBase -noload QmlJSEditor -noload QmlJSTools

Regards

[Mlibu]

@aha_1980 The QT Creator requirements say you need at least OpenGL ES 2.0 support. dlxdiag tells me I have OpenGL 3.2.

When I try that command I can't use the design page at all.

[aha_1980]

@Mlibu Yeah, but does it crash?

[Mlibu]

@aha_1980 No but it didn't crash before unless I used designer. My point is, I did a course, I heard creator/designer/QML/Qt6 was great, so I'm hoping I can use it. I'm also hoping I don't need to buy a gaming PC to do this, just to run linux on it. But I'm seeing that it is going that way.

[Barto]

I notice also a crash of the QML Designer plugin on my PC,
I use arch linux, QtCreator 15, my graphic card is AMD Radeon 4650 Pcie, it supports openGL 3.0.

Crash occurs when trying to add text label on the QML, with a segfault error.

[yuwu]

I also use Arch and the software crashes just as well, just after the recent update. Can building from source solve the problem?